JP5838593B2 - Printing apparatus and printing method - Google Patents

Printing apparatus and printing method Download PDF

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JP5838593B2
JP5838593B2 JP2011116517A JP2011116517A JP5838593B2 JP 5838593 B2 JP5838593 B2 JP 5838593B2 JP 2011116517 A JP2011116517 A JP 2011116517A JP 2011116517 A JP2011116517 A JP 2011116517A JP 5838593 B2 JP5838593 B2 JP 5838593B2
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printing
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JP2012245619A (en
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博 上
博 上
奥野 徳次郎
徳次郎 奥野
厚志 住井
厚志 住井
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セイコーエプソン株式会社
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed
    • B41J3/60Typewriters or selective printing or marking mechanisms, e.g. ink-jet printers, thermal printers characterised by the purpose for which they are constructed for printing on both faces of the printing material

Description

本発明は印刷装置および印刷方法に関し、特に印刷媒体の一方の面に対する液体の付着を行った後に前記印刷媒体の他方の面に対する液体の付着を行うための前記印刷媒体の搬送を行う印刷装置および印刷方法に関する。   The present invention relates to a printing apparatus and a printing method, and in particular, a printing apparatus that transports the print medium for attaching a liquid to the other surface of the print medium after the liquid is attached to one surface of the print medium, and The present invention relates to a printing method.

近年のプリンター等の印刷装置は、両面印刷機構を搭載したものも多く、最も普及している両面印刷方式のプリンターは、1つの記録ヘッドと用紙反転機構とを搭載したタイプである。このようなプリンターでは、記録ヘッドで印刷用紙の一方の面に印刷した後、当該印刷用紙の表裏を所定の搬送経路を通過させることにより反転させ、同じ記録ヘッドで他方の面の印刷も行うようになっている。   Many recent printing apparatuses such as printers are equipped with a double-sided printing mechanism, and the most popular double-sided printing type printer is a type equipped with one recording head and a paper reversing mechanism. In such a printer, after printing on one side of the printing paper by the recording head, the printing paper is reversed by passing the front and back of the printing paper through a predetermined conveyance path, and the other side is also printed by the same recording head. It has become.

ここで、印刷用紙は、インクを付着されてインクを吸収すると印刷用紙の表面が膨潤する一方、当該印刷用紙表面以外の部位は膨潤しにくいため、印刷用紙の表面が膨らむように反りを生じる現象(以下、「膨潤カール」とも呼ぶ。)が起こることが知られている。膨潤カールを発生した用紙は、プリンター内部を搬送しているときにプリンター内部の部材と接触する可能性があり、印刷品質への悪影響(擦過、汚れ、紙折れ等)が懸念される。   Here, when printing ink is attached to ink and absorbs ink, the surface of the printing paper swells, while other portions than the surface of the printing paper are less likely to swell, so that the surface of the printing paper is warped so as to swell. (Hereinafter also referred to as “swelling curl”) is known to occur. The paper with the swollen curl may come into contact with members inside the printer while being conveyed inside the printer, and there is a concern about adverse effects on print quality (such as scratches, dirt, paper breaks, etc.).

このような印刷品質への悪影響を回避するため、従来、大きく2種類の対策が講じられていた。1つ目は、表面への印刷が終了すると、裏面の印刷までに乾燥待機や温風ヒータによる強制的な乾燥等を行うことにより、印刷用紙の膨潤カールを緩和するものである(例えば、特許文献1参照)。2つ目は、膨潤カールの反りと逆方向の反りを印刷用紙に与える機構を設けて、強制的に膨潤カールの反りを除去(以下、「デカール」とも呼ぶ。)するものである。   In order to avoid such adverse effects on print quality, two types of measures have been conventionally taken. First, when printing on the front surface is completed, swelling curling of the printing paper is alleviated by performing drying standby or forced drying with a warm air heater before printing on the back surface (for example, patents). Reference 1). The second is to provide a mechanism that gives the printing paper a warp in the opposite direction to the warp of the swollen curl to forcibly remove the warp of the swollen curl (hereinafter also referred to as “decal”).

特開2000−1010号公報JP 2000-1010 A

しかしながら、膨潤カールは印刷の行われた部位に発生するものであるところ、上述した技術では、印刷用紙のどの部位に印刷が行われたかが考慮されていない。また、膨潤カールの度合はインクに含まれる水分量や用紙の各部位に付着されるインク量に応じて変動するが、上述した技術では、印刷用紙の各部位に付着されたインク量が考慮されていない。
また、乾燥待機を行っても膨潤カールを確実にデカールできるわけではなく、膨潤カールの対策として不十分であった。 Further, even if the drying wait is performed, the swelling curl cannot be surely decaled, and it is insufficient as a countermeasure against the swelling curl. また、温風ヒータで乾燥しても膨潤カールを確実にデカールできるわけではなく、膨潤カールの対策として不十分であった。 Further, even if it is dried with a warm air heater, the swelling curl cannot be surely decaled, and it is insufficient as a countermeasure against the swelling curl. また、デカール用の機構を別途設けるとコストアップや設計変更に繋がるし、当該機構を収容する余分の空間が必要となる。 Further, if a decal mechanism is separately provided, it leads to cost increase and design change, and an extra space for accommodating the mechanism is required. However, the swelling curl is generated at a site where printing is performed. However, the above-described technique does not consider which site of printing paper is printed. In addition, the degree of swelling curl varies depending on the amount of water contained in the ink and the amount of ink attached to each part of the paper, but the above-described technique takes into account the amount of ink attached to each part of the printing paper. Not. However, the swelling curl is generated at a site where printing is performed. However, the above-described technique does not consider which site of printing paper is printed. In addition, the degree of swelling curl varies depending on the amount of water contained in the ink and the amount of ink attached to each part of the paper, but the above-described technique takes into account the amount of ink attached to each part of the printing paper. Not.
Further, even if the apparatus is on standby for drying, the swollen curl cannot be surely decured, which is insufficient as a measure against the swollen curl. Moreover, even if it dries with a warm air heater, the swelling curl cannot be surely decured, and is insufficient as a measure against the swelling curl. Further, if a mechanism for decurling is separately provided, it leads to cost increase and design change, and an extra space for accommodating the mechanism is required. Further, even if the apparatus is on standby for drying, the swollen curl cannot be surely decured, which is insufficient as a measure against the swollen curl. Moreover, even if it dries with a warm air heater, the swelling curl cannot be surely decured. , and is insufficient as a measure against the swelling curl. Further, if a mechanism for decurling is separately provided, it leads to cost increase and design change, and an extra space for accommodating the mechanism is required.

本発明は、上記課題に鑑みてなされたもので、少なくとも、デカールのための特別な機構等を追加してコストアップすることなく、付着されたインク量に応じた適切なデカールを行うことが可能な印刷装置および印刷方法の提供を目的とする。 The present invention has been made in view of the above problems, and at least, it is possible to perform decurling appropriately according to the amount of attached ink without adding a special mechanism for decurling and the like to increase the cost. An object is to provide a printing apparatus and a printing method.

《請求項1》
本発明の態様の1つは、印刷媒体の一方の面に対する液体の付着を行った後に前記印刷媒体の他方の面に対する液体の付着を行うために前記印刷媒体の搬送を行う印刷装置であって、液体の付着量を前記一方の面の領域毎に判定する手段と、前記印刷媒体の所定部位を前記搬送の経路上の待機位置にて所定時間待機させる搬送待機手段と、を備える構成とされる。 One aspect of the present invention is a printing apparatus that conveys the print medium in order to attach the liquid to one side of the print medium and then attach the liquid to the other side of the print medium. The configuration includes a means for determining the amount of liquid adhering to each region of the one surface, and a transport waiting means for holding a predetermined portion of the print medium at a standby position on the transport path for a predetermined time. To print. ここで、前記所定部位は前記判定手段によって液体の付着量が所定値以上と判定された領域を有する部位であり、前記待機位置は前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反り前記印刷媒体の前記所定部位に発生させる位置である。 Here, the predetermined portion is a portion having a region where the amount of liquid adhered is determined to be equal to or higher than a predetermined value by the determination means, and the standby position is the warp of the print medium generated by the adhesion of the liquid to the one surface. This is a position where a warp in the opposite direction to the above is generated at the predetermined portion of the print medium.
<Claim 1> <Claim 1>
One aspect of the present invention is a printing apparatus that transports the print medium in order to adhere the liquid to the other surface of the print medium after the liquid has adhered to the one surface of the print medium. And a means for determining the amount of liquid adhesion for each region of the one surface and a transport standby means for waiting a predetermined portion of the print medium at a standby position on the transport path for a predetermined time. The Here, the predetermined portion is a portion having a region in which the amount of adhesion of the liquid is determined to be a predetermined value or more by the determination means, and the standby position is the warp of the print medium caused by the adhesion of the liquid to the one surface. This is a position for generating a warp in the opposite direction to the predetermined portion of the print medium. One aspect of the present invention is a printing apparatus that transports the print medium in order to adhere the liquid to the other surface of the print medium after the liquid has adhered to the one surface of the print medium. And a means for determining the amount of liquid adhesion for each region of the one surface and a transport standby means for waiting a predetermined portion of the print medium at a standby position on the transport path for a predetermined time. The Here, the predetermined portion is a portion having a region in This is a position for which the amount of adhesion of the liquid is determined to be a predetermined value or more by the determination means, and the standby position is the warp of the print medium caused by the adhesion of the liquid to the one surface. generating a warp in the opposite direction to the predetermined portion of the print medium.

前記構成において、前記印刷媒体は平面状の媒体であって液体を付着させることができるものであればいかなるものであってもよく、紙系の印刷媒体(光沢紙、マット紙、普通紙等)のみならず、塩化ビニルのように分厚い横断幕に使われるようなメディア、透明フィルム等、が例示される。なお、前記印刷媒体の表面と裏面の一方が前記一方の面を構成し、他方が前記他方の面を構成する。
また、前記搬送は、前記一方の面に対して液体を付着させた液体吐出部(例えば、印刷ヘッド等)が前記他方の面に対して液体を付着できるように前記印刷媒体の表裏を反転させる搬送であってもよいし、前記一方の面に対して液体を付着させた液体吐出部とは異なる他の液体吐出部が前記他方の面に対して液体を付着できる位置に前記印刷媒体を移動させる搬送であってもよい。 Further, in the transport, the front and back sides of the printing medium are reversed so that the liquid ejection portion (for example, a print head or the like) having the liquid adhered to the one surface can adhere the liquid to the other surface. The printing medium may be conveyed, or the printing medium may be moved to a position where another liquid ejection unit different from the liquid ejection portion in which the liquid is adhered to the one surface can adhere the liquid to the other surface. It may be a transport to be carried. また、前記所定時間は、前記印刷媒体に発生した前記反りが解消する程度の時間であればよく、例えば、前記印刷媒体に対する前記液体の定着に要する時間としたり、当該時間から前記搬送に要する時間を除いた時間としたりすることができる。 Further, the predetermined time may be a time sufficient to eliminate the warp generated in the print medium, for example, a time required for fixing the liquid on the print medium, or a time required for the transport from the time. It can be the time excluding. なお、前記所定時間は、前記一方の面に付着された液体量や液体種類、印刷媒体の種類等、温度や湿度等の印刷環境、を考慮して決定してもよい。 The predetermined time may be determined in consideration of the amount and type of liquid adhering to the one surface, the type of printing medium, and the printing environment such as temperature and humidity. 前記印刷媒体に発生する反りは、一般的に、前記液体が付着された前記一方の面が膨らむ反りであるが、むろん、印刷媒体の素材や液体の材料次第では逆の反りが発生する可能性を除外するものではない。 The warp generated in the print medium is generally a warp in which one surface to which the liquid is attached swells, but of course, the reverse warp may occur depending on the material of the print medium and the material of the liquid. Is not excluded. In the above-described configuration, the printing medium may be any medium as long as it is a flat medium and can adhere a liquid. Paper-based printing medium (glossy paper, matte paper, plain paper, etc.) Not only media such as vinyl chloride used for thick banners, transparent films, etc. are exemplified. One of the front and back surfaces of the print medium constitutes the one surface, and the other constitutes the other surface. In the above-described configuration, the printing medium may be any medium as long as it is a flat medium and can adhere a liquid. Paper-based printing medium (glossy paper, matte paper, plain paper, etc.) Not only media such as vinyl chloride used for thick banners, transparent films, etc. are 00. One of the front and back surfaces of the print medium industries the one surface, and the other specifically the other surface.
In addition, the transport reverses the front and back of the printing medium so that a liquid ejection unit (for example, a print head) that has adhered liquid to the one surface can adhere liquid to the other surface. The print medium may be transported or moved to a position where another liquid ejection unit different from the liquid ejection unit that adhered the liquid to the one surface can adhere the liquid to the other surface. It may be a conveyance to be performed. In addition, the predetermined time may be a time enough to eliminate the warp generated in the print medium. For example, the predetermined time may be a time required for fixing the liquid to the print medium or a time required for the conveyance from the time. It can be set as the time excluding. The predetermined time may be determined in consideration of the printing environment such as temperature and humidity, such as the amount and type of liquid adhered to the one surface, the type of printing medium, and In addition, the transport reverses the front and back of the printing medium so that a liquid ejection unit (for example, a print head) that has adhered liquid to the one surface can adhere liquid to the other surface. The print medium may be sent off. or moved to a position where another liquid ejection unit different from the liquid ejection unit that adhered the liquid to the one surface can adhere the liquid to the other surface. It may be a transport to be performed. In addition, the predetermined time may be It can be set as the time. For example, the predetermined time may be a time required for fixing the liquid to the print medium or a time required for the transport from the time. excluding. The predetermined time may be determined in consideration of the printing environment such as temperature and humidity, such as the amount and type of liquid adhered to the one surface, the type of printing medium, and the like. The warp generated in the print medium is generally a warp in which the one surface to which the liquid is attached swells, but of course, the reverse warp may occur depending on the material of the print medium and the liquid material. Is not excluded. The like. The warp generated in the print medium is generally a warp in which the one surface to which the liquid is attached swells, but of course, the reverse warp may occur depending on the material of the print medium and the liquid material. Is not excluded.

前記構成によれば、前記一方の面の領域毎に判定された液体の付着量に基づいて、液体の付着量が所定値以上と判定された領域を有する部位を前記所定部位に決定し、前記搬送待機手段は、前記搬送が行われているときに、前記所定部位が前記待機位置にある状態で前記搬送を所定時間待機させる。この待機が行われている間、液体を付着によって発生した反りのある前記所定部位は、当該反りと逆向きに反らされた状態となっており、待機が終了して搬送が開始されるまでに、液体を付着によって発生した反りが解消する。このように、前記搬送の経路上の適切な位置で待機を行うことで前記反りを解消するため、反りの解消のために新たな機構等を追加する必要が無い。また、液体の付着量が所定値を超えた部位に対して前記待機を行うため、必要な場合に必要な箇所に対して前記反りの解消が行われる。   According to the above configuration, based on the liquid adhesion amount determined for each region of the one surface, a part having a region in which the liquid adhesion amount is determined to be a predetermined value or more is determined as the predetermined part, The transport standby means waits for the transport for a predetermined time in a state where the predetermined portion is at the standby position when the transport is being performed. While the standby is being performed, the predetermined portion having the warp caused by the adhesion of the liquid is warped in the opposite direction to the warp until the standby is completed and the conveyance is started. In addition, the warpage caused by the adhesion of the liquid is eliminated. As described above, since the warp is eliminated by waiting at an appropriate position on the transport path, it is not necessary to add a new mechanism or the like to eliminate the warp. In addition, since the standby is performed for a portion where the liquid adhesion amount exceeds a predetermined value, the warp is eliminated for a necessary portion when necessary.

《請求項2》
本発明の態様の1つでは、前記印刷媒体を搬送する方向における前記所定部位の一端が、支持部材によって挟持されることにより前記印刷媒体を搬送する方向における前記所定部位の他端が所定の台面に押し付けられる位置が、前記待機位置の少なくとも一つである In one aspect of the present invention, one end of the predetermined portion in the direction for conveying the pre-Symbol print medium, the other end of the predetermined portion in the direction of conveying the printing medium by being clamped by the support member is in a predetermined The position pressed against the table surface is at least one of the standby positions . このように、前記所定部位の一端を支持部材にて挟持したときに他端が所定の台面に押し付けられるよう挟持することにより、前記所定部位の一端から他端までの部位が、前記押し付けられる方向とは逆の方向に確実に屈曲する(反りが発生する)。 In this way, when one end of the predetermined portion is sandwiched by the support member, the other end is pressed against the predetermined base surface, so that the portion from one end to the other end of the predetermined portion is pressed in the direction of being pressed. It surely bends in the opposite direction (warpage occurs). この屈曲は、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反りであるため、前記待機位置にて待機することにより、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りを解消することができる。 This bending are the warp and reverse warping of the printing medium caused by adhesion of the liquid to the previous SL one side, by waiting at the standby position, caused by adhesion of the liquid to the one surface It is possible to eliminate the warp of the print medium.
<Claim 2> <Claim 2>
In one aspect of the present invention, one end of the predetermined portion in the direction for conveying the pre-Symbol print medium, the other end of the predetermined portion in the direction of conveying the printing medium by being clamped by the support member is in a predetermined The position pressed against the table surface is at least one of the standby positions . In this way, when the one end of the predetermined portion is held by the support member, the other end is pressed against the predetermined base surface, whereby the portion from one end to the other end of the predetermined portion is pressed. It bends reliably in the opposite direction (warping occurs). This bending are the warp and reverse warping of the printing medium caused by adhesion of the liquid to the previous SL one side, by waiting at the standby position, caused by adhesion of the liquid to the one surface It is possible to eliminate the warping of the print medium. In one aspect of the present invention, one end of the predetermined portion in the direction for conveying the pre-Symbol print medium, the other end of the predetermined portion in the direction of reproducing the printing medium by being clamped by the support member is in a predetermined The position pressed against the table surface is at least one of the standby positions . In this way, when the one end of the predetermined portion is held by the support member, the other end is pressed against the predetermined base surface, therefore the This bending are the warp and reverse warping of the printing medium caused by adhesion of the liquid to the previous SL one. It bends reliably in the opposite direction (warping occurs). This bending are the warp and reverse warping of the printing medium caused by adhesion of the liquid to the previous SL one. side, by waiting at the standby position, caused by adhesion of the liquid to the one surface It is possible to eliminate the warping of the print medium.

《請求項3》
本発明の態様の1つでは、前記所定部位の全体が前記印刷媒体の表裏を反転させる反転ローラーに接触する位置が、前記待機位置の少なくとも一つである。当該構成によれば、反転ローラーの曲率に応じた反りが前記所定部位に発生し、記待機位置にて待機することにより、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りを解消することができる。
<Claim 3>
In one aspect of the present invention, the position where the entire front Symbol predetermined portion contacts the reverse roller to reverse the front and back of the print medium is at least one of said waiting position. According to this configuration, it occurs warping the predetermined portion corresponding to the curvature of the reverse roller, by waiting in front Symbol standby position, the warpage of the print medium caused by adhesion of the liquid to the one surface Can be resolved. In one aspect of the present invention, the position where the entire front Symbol predetermined portion contacts the reverse roller to reverse the front and back of the print medium is at least one of said waiting position. According to this configuration, it occurs warping the predetermined portion corresponding to the curvature of the reverse roller, by waiting in front Symbol standby position, the warpage of the print medium caused by adhesion of the liquid to the one surface Can be resolved.

《請求項4》
本発明の態様の1つでは、前記所定部位は、前記所定部位の少なくとも一方を支持部材にて挟持された状態で前記一方の面に対する液体の付着が行われる領域を有する部位であり、前記所定部位の全体が前記印刷媒体の表裏を反転させる反転ローラーに接触する位置が、前記待機位置の少なくとも一つである In one, the predetermined portion of the embodiment of the present invention is a region having a region in which adhesion of the liquid is carried out the relative one surface while being held by at least one support member of said predetermined portion, before Symbol At least one of the standby positions is a position where the entire predetermined portion contacts the reversing roller that reverses the front and back of the print medium. 当該構成によれば、両端を固定された状態で液体の付着が行われる部位についても、記待機位置にて待機することにより、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りを適切に解消することができる。 According to the configuration, for the site of attachment of the liquid in a state of being fixed at both ends is performed by waiting in front Symbol standby position, the warp of the printing medium caused by adhesion of the liquid to the one surface Can be properly resolved.
<Claim 4> <Claim 4>
In one, the predetermined portion of the embodiment of the present invention is a region having a region in which adhesion of the liquid is carried out the relative one surface while being held by at least one support member of said predetermined portion, before Symbol The position where the entire predetermined part contacts the reversing roller that reverses the front and back of the printing medium is at least one of the standby positions . According to the configuration, for the site of attachment of the liquid in a state of being fixed at both ends is performed by waiting in front Symbol standby position, the warp of the printing medium caused by adhesion of the liquid to the one surface Can be solved appropriately. In one, the predetermined portion of the embodiment of the present invention is a region having a region in which adhesion of the liquid is carried out the relative one surface while being held by at least one support member of said predetermined portion, before Symbol The position where the entire predetermined part contacts the reversing roller that reverses the front and back of the printing medium is at least one of the standby positions . According to the configuration, for the site of attachment of the liquid in a state of being fixed at both ends. is performed by waiting in front Symbol standby position, the warp of the printing medium caused by adhesion of the liquid to the one surface Can be solved appropriately.

《請求項5》
本発明の態様の1つは、前記待機位置においては、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反りを前記印刷媒体に生じさせた状態に維持する支持部材が前記印刷媒体を挟持する構成とされ、前記待機位置が複数有る場合に、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反りであって各待機位置において発生する反りの曲率と、各待機位置において前記支持部材が前記印刷媒体を挟持する前記印刷媒体の幅方向の範囲と、各待機位置において前記支持部材が前記印刷媒体を挟持する力と、に応じて、いずれかの待機位置が選択される。 One aspect of the present invention is a support member that maintains a warp in the opposite direction to the warp of the print medium generated by adhesion of liquid to the one surface in the standby position. Is configured to sandwich the print medium, and when there are a plurality of the standby positions, the warp in the opposite direction to the warp of the print medium generated by the adhesion of the liquid to the one surface is generated at each standby position. the curvature of the warp, and the width direction of the range of the printing medium in which the support member at each standby position sandwiching the print medium, the pressure of the support member at each standby position sandwiching the printing medium, depending on , One of the standby positions is selected. 当該構成によれば、印刷媒体に発生した反り(前記一方の面に対する液体の付着により発生する前記印刷媒体の反り)に応じて、当該反りを解消するために最適な待機位置を複数の待機位置から選択するための基準が提供される。 According to the configuration, in accordance with the warp generated in the print medium (warp of the print medium generated by the adhesion of the liquid to the one surface), the optimum standby position for eliminating the warp is set to a plurality of standby positions. Criteria for choosing from are provided.
<Claim 5> <Claim 5>
One aspect of the present invention is that, in the standby position, a support member that maintains a state in which the warp in the direction opposite to the warp of the print medium caused by the adhesion of the liquid to the one surface is generated in the print medium. Is configured to sandwich the print medium, and when there are a plurality of the standby positions, the warp in the direction opposite to the warp of the print medium caused by the adhesion of the liquid to the one surface occurs at each standby position. the curvature of the warp, and the width direction of the range of the printing medium in which the support member at each standby position sandwiching the print medium, the pressure of the support member at each standby position sandwiching the printing medium, depending on One of the standby positions is selected. According to this configuration, a plurality of standby positions that are optimal standby positions for eliminating the warp according to the warp t One aspect of the present invention is that, in the standby position, a support member that maintains a state in which the warp in the direction opposite to the warp of the print medium caused by the adhesion of the liquid to the one surface is generated in The print medium. Is configured to sandwich the print medium, and when there are a plurality of the standby positions, the warp in the direction opposite to the warp of the print medium caused by the adhesion of the liquid to the one surface occurs at each standby position. The curvature of the warp, and the width direction of the range of the printing medium in which the support member at each standby position sandwiching the print medium, the pressure of the support member at each standby position sandwiching the printing medium, depending on One of the standby positions is selected. According to this configuration, a plurality of standby positions that are optimal standby positions for eliminating the warp according to the warp t hat has occurred in the print medium (the warp of the print medium caused by the adhesion of liquid to the one surface). Criteria for choosing from are provided. hat has occurred in the print medium (the warp of the print medium caused by the adhesion of liquid to the one surface). Criteria for choosing from are provided.

なお、上述した印刷装置は、他の機器に組み込まれて実施されたり他の方法とともに実施されたりする等の各種の態様を含む。また、本発明は上記印刷装置を備える印刷システム、前記印刷装置の構成に対応した工程を有する印刷方法、前記印刷装置の構成に対応した機能をコンピューターに実現させるプログラム、当該プログラムを記録したコンピューター読み取り可能な記録媒体、等としても実現可能である。   Note that the above-described printing apparatus includes various modes such as being incorporated in another device and implemented with another method. The present invention also provides a printing system including the printing apparatus, a printing method having a process corresponding to the configuration of the printing apparatus, a program for causing a computer to realize a function corresponding to the configuration of the printing apparatus, and a computer reading that records the program It can also be realized as a possible recording medium.

プリンターの外観図である。 1 is an external view of a printer. 用紙搬送機構における部材配置を断面的に示した図である。 FIG. 4 is a cross-sectional view of member arrangement in a paper transport mechanism. 給紙カセット10から給紙される印刷用紙PMの搬送経路を示す図である。 FIG. 3 is a diagram illustrating a conveyance path of a printing sheet PM fed from a sheet feeding cassette. 印刷用紙PMのインク打込量の判定における領域を説明する図である。 It is a figure explaining the area | region in determination of the ink placement amount of printing paper PM. 自動用紙分離部ADF2が給紙する印刷用紙PMの搬送経路を示す図である。 FIG. 6 is a diagram illustrating a conveyance path of a printing paper PM fed by an automatic paper separation unit ADF2. 反転給紙経路を示す図である。 FIG. 6 is a diagram illustrating a reverse sheet feeding path. 紙送りローラー20gと紙送り従動ローラー20hの押圧方向を説明する図である。 It is a figure explaining the pressing direction of the paper feed roller 20g and the paper feed driven roller 20h. 印刷用紙PMに発生する膨潤カールの説明図である。 It is explanatory drawing of the swelling curl which generate | occur | produces in printing paper PM. プリンター100の制御にかかる電気的・ソフトウェア的構成を示すブロック図である。 FIG. 2 is a block diagram illustrating an electrical / software configuration related to control of a printer. 搬送制御処理の流れを示すフローチャートである。 It is a flowchart which shows the flow of a conveyance control process. 各領域におけるインク打込量と待機位置との対応関係を説明する図である。 FIG. 6 is a diagram for explaining a correspondence relationship between an ink ejection amount and a standby position in each region. 後端領域のインク打込量がVよりも大きい場合の印刷用紙PMの待機状態を示す図である。 FIG. 10 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount in the rear end region is larger than V. 後端領域のインク打込量がVよりも小さくWよりも大きい場合の印刷用紙PMの待機状態を示す図である。 FIG. 10 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount in the rear end region is smaller than V and larger than W. 中間領域のインク打込量がよりも大きい場合の印刷用紙PMの待機状態を示す図である。 FIG. 10 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount in the intermediate region is larger than X. 先端領域のインク打込量がYよりも大きい場合の印刷用紙PMの待機状態を示す図である。 FIG. 10 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount in the leading end region is larger than Y. 先端領域のインク打込量がYよりも小さくZよりも大きい場合の印刷用紙PMの待機状態を示す図である。 FIG. 10 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount in the leading end region is smaller than Y and larger than Z. デカール効果と、用紙に発生した反りに対して逆向きに発生された反りの曲率と、の関係を説明する図である。 It is a figure explaining the relationship between a decurling effect and the curvature of the curvature generate | occur | produced in the reverse direction with respect to the curvature generate | occur | produced in the paper. デカール効果と、用紙に発生した反りを維持させる支持部材が紙を抑える圧力と、の関係を説明する図である。 It is a figure explaining the relationship between a decurling effect and the pressure which the support member which maintains the curvature which generate | occur | produced in the paper suppresses paper. デカール効果と、用紙に発生した反りを維持させる支持部材が用紙の幅方向において押圧する範囲と、の関係を説明する図である。 It is a figure explaining the relationship between a decurling effect and the range which the support member which maintains the curvature generate | occur | produced in the paper presses in the width direction of a paper. ローラーと弾性体を用いた場合の一例を示す図である。 It is a figure which shows an example at the time of using a roller and an elastic body. 温度や湿度に応じて膨潤カールの度合がどのように変化するかを示すグラフである。 It is a graph which shows how the degree of swelling curl changes according to temperature and humidity.

以下、下記の順序に従って本発明の実施形態を説明する。
(1)印刷装置の構成:
(2)搬送制御処理:
(3)変形例:
Hereinafter, embodiments of the present invention will be described in the following order.
(1) Configuration of printing apparatus:
(2) Transport control processing:
(3) Modification:

(1)印刷装置の構成:
《プリンターの全体構成》

図1には、プリンターの外観の一例を示してある。 FIG. 1 shows an example of the appearance of the printer. なお、以下では、同図に示す上下左右前後を参照して部材の移動方向や取り付け位置等を説明するが、むろん、部材の移動方向や取り付け位置等は設計に応じて適宜に変更される。 In the following, the moving direction and mounting position of the member will be described with reference to the vertical, horizontal, front and rear directions shown in the figure, but of course, the moving direction and mounting position of the member are appropriately changed according to the design. 同図において、プリンター100は、外観上、給紙カセット10、手差しトレイ11、スタッカ12、操作パネル13を備えている。 In the figure, the printer 100 is apparently provided with a paper cassette 10, a manual feed tray 11, a stacker 12, and an operation panel 13. (1) Configuration of printing apparatus: (1) Configuration of printing apparatus:
<Overall configuration of printer> <Overall configuration of printer>
FIG. 1 shows an example of the appearance of the printer. In the following, the movement direction and attachment position of the member will be described with reference to the top, bottom, left and right and front and rear shown in the figure, but the movement direction and attachment position of the member will be changed as appropriate according to the design. In FIG. 1, the printer 100 includes a paper feed cassette 10, a manual feed tray 11, a stacker 12, and an operation panel 13 in appearance. FIG. 1 shows an example of the appearance of the printer. In the following, the movement direction and attachment position of the member will be described with reference to the top, bottom, left and right and front and rear shown in the figure, but The movement direction and attachment position of the member will be changed as appropriate according to the design. In FIG. 1, the printer 100 includes a paper feed cassette 10, a manual feed tray 11, a stacker 12, and an operation panel 13 in appearance.

給紙カセット10は、プリンター100の前面下部において手前へ引き出し可能に設けられ、内部には複数枚の印刷用紙PMを収容することができる。給紙カセット10をプリンター100の内部に収容すると、給紙カセット10に収容された印刷用紙PMに対する印刷が可能となる。すなわち、操作パネル13やプリンター100に接続されたホスト装置(不図示)によって給紙カセット10に収容されている印刷用紙PMへの印刷を指示されると、後述する自動用紙分離部ADF1が給紙カセット10から1枚の印刷用紙PMを分離し、用紙搬送経路へ送り込むことが可能となる。ホスト装置は、例えば、プリンター100のドライバーをインストールされたコンピューターにより構成される。   The paper feed cassette 10 is provided in the lower front portion of the printer 100 so as to be able to be pulled out toward the front, and a plurality of printing papers PM can be accommodated therein. When the paper feed cassette 10 is accommodated in the printer 100, printing on the printing paper PM accommodated in the paper feed cassette 10 becomes possible. That is, when printing on the printing paper PM stored in the paper feed cassette 10 is instructed by a host device (not shown) connected to the operation panel 13 or the printer 100, an automatic paper separation unit ADF1 described later feeds paper. One sheet of printing paper PM can be separated from the cassette 10 and sent to the paper conveyance path. The host device is constituted by a computer in which a driver for the printer 100 is installed, for example.

用紙搬送経路の途中には、左右に延びるガイド軸15に沿って主走査方向(図1では、左右方向)に往復動可能なキャリッジ14が設けられており、主走査方向と直交する副走査方向(図1では、前後方向)に搬送される印刷用紙PMに対し、主走査方向に往復動しつつ適宜のタイミングでインクを吐出して付着させることにより印刷用紙PMの表面に文字や画像を形成(印刷)する。文字や画像の形成が完了した印刷用紙PMは、プリンター100の外部へと排出され、スタッカ12に積層される。   A carriage 14 that can reciprocate in the main scanning direction (left-right direction in FIG. 1) along the guide shaft 15 extending in the left-right direction is provided in the middle of the paper conveyance path, and is in the sub-scanning direction orthogonal to the main scanning direction. Characters and images are formed on the surface of the printing paper PM by ejecting and adhering ink at an appropriate timing while reciprocating in the main scanning direction with respect to the printing paper PM conveyed in the front-rear direction in FIG. (Print. The printing paper PM on which characters and images have been formed is discharged outside the printer 100 and stacked on the stacker 12.

キャリッジ14の下部には、インクを噴射(吐出)する記録ヘッド14aが設けられ、さらに本体ケース内において記録ヘッド14aの下方にはプラテン20k(図2等参照)が配置されている。プラテン20kは、左右方向に長い台面を記録ヘッド14aに対面させており、主走査の各位置において、記録ヘッド14aと台面とが等距離となるように形成されている。従って、印刷用紙PMは、プラテン20k上に載置されると、記録ヘッド14aとインク付着対象部位との距離を一定に規定される。キャリッジ14の上部には、ブラック用およびカラー用の各インクカートリッジが着脱可能に装着されている。記録ヘッド14aは、各インクカートリッジから供給される各色のインクを、各色用のノズルから噴射する。   A recording head 14a that ejects (discharges) ink is provided below the carriage 14, and a platen 20k (see FIG. 2 and the like) is disposed below the recording head 14a in the main body case. The platen 20k has a base surface that is long in the left-right direction facing the recording head 14a, and is formed so that the recording head 14a and the base surface are equidistant at each main scanning position. Therefore, when the printing paper PM is placed on the platen 20k, the distance between the recording head 14a and the site to which ink is to be applied is defined to be constant. On the upper part of the carriage 14, black and color ink cartridges are detachably mounted. The recording head 14a ejects each color ink supplied from each ink cartridge from each color nozzle.

手差しトレイ11は、プリンター100の上面後部に後傾した斜面として設けられ、当該斜面に複数枚の印刷用紙PMを積載することができる。操作パネル13やプリンター100に接続されたホスト装置(不図示)によって手差しトレイ11に積載されている印刷用紙PMへの印刷を指示されると、後述する自動用紙分離部ADF2が手差しトレイ11から1枚の印刷用紙PMを分離し、用紙搬送経路へ送り込み、上述の給紙カセット10から供給された印刷用紙PMと同様に用紙搬送経路の途中で印刷が行われ、印刷が完了するとスタッカ12に積層される。   The manual feed tray 11 is provided as a slope inclined backward on the upper rear portion of the printer 100, and a plurality of printing sheets PM can be stacked on the slope. When an instruction to print on the printing paper PM loaded on the manual feed tray 11 is given by a host device (not shown) connected to the operation panel 13 or the printer 100, an automatic paper separation unit ADF2, which will be described later, starts from the manual feed tray 11. Sheets of printing paper PM are separated, sent to the paper conveyance path, and printing is performed in the middle of the paper conveyance path in the same manner as the printing paper PM supplied from the paper feed cassette 10 described above, and is stacked on the stacker 12 when printing is completed. Is done.

《用紙搬送機構の構成》
次に、用紙搬送機構について説明する。
図2は、用紙搬送機構における部材配置を断面的に示した図である。 FIG. 2 is a cross-sectional view showing the arrangement of members in the paper transport mechanism. 同図は、プリンター100の用紙搬送機構の要部を側面(図1では右側)から見て示した要部側面図であり、用紙搬送機構の主要な構成の位置関係を概略的に示してある。 The figure is a side view of the main part of the paper transport mechanism of the printer 100 as viewed from the side surface (right side in FIG. 1), and schematically shows the positional relationship of the main configurations of the paper transport mechanism. .. 同図に示すように、プリンター100は、分離ローラー20a、分離ローラー20b、分離従動ローラー20c、中間ローラー20d、中間従動ローラー20e,20f、紙送りローラー20g、紙送り従動ローラー20h、排紙ローラー20i、排紙従動ローラー20j、プラテン20k、用紙検知センサー20l、を備えている。 As shown in the figure, the printer 100 includes a separation roller 20a, a separation roller 20b, a separation driven roller 20c, an intermediate roller 20d, an intermediate driven roller 20e, 20f, a paper feed roller 20 g, a paper feed driven roller 20h, and a paper ejection roller 20i. , A paper ejection driven roller 20j, a platen 20k, and a paper detection sensor 20l. その他、用紙が所定の搬送経路で搬送されるようにガイドする部材が各所に配置されており、図には太線で示してある。 In addition, members that guide the paper so that it is conveyed by a predetermined transfer path are arranged in various places, and are shown by thick lines in the figure. <Configuration of paper transport mechanism> <Configuration of paper transport mechanism>
Next, the paper transport mechanism will be described. Next, the paper transport mechanism will be described.
FIG. 2 is a cross-sectional view of member arrangement in the paper transport mechanism. FIG. 2 is a side view of the main part of the main part of the paper transport mechanism of the printer 100 as viewed from the side (right side in FIG. 1), and schematically shows the positional relationship of the main components of the paper transport mechanism. . As shown in the figure, the printer 100 includes a separation roller 20a, a separation roller 20b, a separation driven roller 20c, an intermediate roller 20d, intermediate driven rollers 20e and 20f, a paper feed roller 20g, a paper feed driven roller 20h, and a paper discharge roller 20i. , A paper discharge driven roller 20j, a platen 20k, and a paper detection sensor 20l. In addition, members for guiding the sheet so as to be conveyed along a predetermined conveyance path are arranged in various places, and are indicated by bold lines in the drawing. FIG. 2 is a cross-sectional view of member arrangement in the paper transport mechanism. FIG. 2 is a side view of the main part of the main part of the paper transport mechanism of the printer 100 as viewed from the side (right side) in FIG. 1), and arrange shows the positional relationship of the main components of the paper transport mechanism. As shown in the figure, the printer 100 includes a separation roller 20a, a separation roller 20b, a separation driven roller 20c, an intermediate roller 20d, intermediate driven printer 20e and 20f, a paper feed roller 20g, a paper feed driven roller 20h, and a paper discharge roller 20i., A paper discharge driven roller 20j, a platen 20k, and a paper detection sensor 20l. In addition, members for guiding the sheet so as to be transmitted along a predetermined gross path are arranged in various places, and are indicated by bold lines in the drawing.

《カセットからの給紙》
図3は、給紙カセット10から給紙される印刷用紙PMの搬送経路を示す図であり、図4は後述する印刷用紙PMのインク打込量の判定における領域を説明する図である。図3において、給紙カセット10から給紙される印刷用紙PMの搬送経路は二点鎖線で示してある。なお、以下ではインク打込量のことをインクデューティー記載することもある。
給紙カセット10からの給紙が選択されると、所定の機構により分離ローラー20aに印刷用紙PMが当接され、給紙カセット10に収容された印刷用紙PMの1枚が、分離ローラー20aの回転駆動(図3では反時計回り方向への駆動)により、中間ローラー20dと中間従動ローラー20eの間に到達する。 When paper feeding from the paper feed cassette 10 is selected, the printing paper PM is brought into contact with the separation roller 20a by a predetermined mechanism, and one sheet of the printing paper PM housed in the paper feed cassette 10 is placed on the separation roller 20a. It reaches between the intermediate roller 20d and the intermediate driven roller 20e by rotational driving (driving in the counterclockwise direction in FIG. 3). なお、分離ローラー20aや印刷用紙PMを分離ローラー20aに当接させるための機構(不図示)等が自動用紙分離部ADF1を構成する。 A mechanism (not shown) for bringing the separation roller 20a and the printing paper PM into contact with the separation roller 20a constitutes the automatic paper separation unit ADF1.
<Feeding from cassette> <Feeding from cassette>
FIG. 3 is a diagram illustrating a conveyance path of the printing paper PM fed from the paper feeding cassette 10, and FIG. 4 is a diagram illustrating an area for determining the ink placement amount of the printing paper PM, which will be described later. In FIG. 3, the conveyance path of the printing paper PM fed from the paper feeding cassette 10 is indicated by a two-dot chain line. Incidentally, sometimes to be referred to as ink duty that the ink landing amount is below. FIG. 3 is a diagram illustrating a utilizing path of the printing paper PM fed from the paper feeding cassette 10, and FIG. 4 is a diagram illustrating an area for determining the ink placement amount of the printing paper PM, which will be described later In FIG. 3, the utilizing path of the printing paper PM fed from the paper feeding cassette 10 is indicated by a two-dot chain line. Diagram, sometimes to be referred to as ink duty that the ink landing amount is below.
When paper feed from the paper feed cassette 10 is selected, the printing paper PM is brought into contact with the separation roller 20a by a predetermined mechanism, and one piece of the printing paper PM accommodated in the paper feed cassette 10 is separated from the separation roller 20a. It reaches between the intermediate roller 20d and the intermediate driven roller 20e by rotational drive (drive in the counterclockwise direction in FIG. 3). A mechanism (not shown) for bringing the separation roller 20a and the printing paper PM into contact with the separation roller 20a constitutes the automatic paper separation unit ADF1. When paper feed from the paper feed cassette 10 is selected, the printing paper PM is brought into contact with the separation roller 20a by a predetermined mechanism, and one piece of the printing paper PM accommodated in the paper feed cassette 10 is separated from the separation roller 20a. It reaches between the intermediate roller 20d and the intermediate driven roller 20e by rotational drive (drive in the counterclockwise direction in FIG. 3). A mechanism (not shown) for bringing the separation roller 20a and the printing paper PM into contact with the separation roller 20a forming the automatic paper separation unit ADF1.

自動用紙分離部ADF1が給紙した印刷用紙PMは、主に中間ローラー20dの順方向回転駆動(図3では反時計回り方向の回転駆動)により、中間ローラー20dと中間従動ローラー20eに押圧挟持されつつ搬送され、先端が中間ローラー20dと中間従動ローラー20fの間に到達する(状態1−1)。さらに、中間ローラー20dの順方向回転駆動により、印刷用紙PMは、途中までは中間ローラー20dと中間従動ローラー20eの間および中間ローラー20dと中間従動ローラー20fの間に押圧挟持されつつ搬送され、途中からは中間ローラー20dと中間従動ローラー20fの間に押圧挟持されつつ搬送され、先端が紙送りローラー20gと紙送り従動ローラー20hの間に到達する(状態1−2)。   The printing paper PM fed by the automatic paper separating unit ADF1 is pressed and sandwiched between the intermediate roller 20d and the intermediate driven roller 20e mainly by the forward rotation driving of the intermediate roller 20d (rotation driving in the counterclockwise direction in FIG. 3). The leading end reaches between the intermediate roller 20d and the intermediate driven roller 20f (state 1-1). Further, due to the forward rotation drive of the intermediate roller 20d, the printing paper PM is conveyed while being pressed and sandwiched between the intermediate roller 20d and the intermediate driven roller 20e and between the intermediate roller 20d and the intermediate driven roller 20f. Is conveyed while being pressed and sandwiched between the intermediate roller 20d and the intermediate driven roller 20f, and the leading end reaches between the paper feed roller 20g and the paper feed driven roller 20h (state 1-2).

その後、印刷用紙PMは、主に中間ローラー20dと紙送りローラー20gの順方向回転駆動により、途中までは中間ローラー20dと中間従動ローラー20eの間および紙送りローラー20gと紙送り従動ローラー20hの間に押圧挟持されつつ搬送され、途中からは紙送りローラー20gと紙送り従動ローラー20hの間に押圧挟持されつつ搬送され、先端が排紙ローラー20iと排紙従動ローラー20jの間に到達する(状態1−3)。印刷用紙PMの表面への印刷は、状態1−2から状態1−3の間に開始される。   Thereafter, the printing paper PM is driven between the intermediate roller 20d and the intermediate driven roller 20e and between the paper feed roller 20g and the paper driven driven roller 20h by the forward rotation of the intermediate roller 20d and the paper feed roller 20g. In the middle, the paper is conveyed while being pressed and nipped between the paper feed roller 20g and the paper feed driven roller 20h, and the leading end reaches between the paper discharge roller 20i and the paper discharge driven roller 20j (state) 1-3). Printing on the surface of the printing paper PM is started between the state 1-2 and the state 1-3.

この状態1−2から状態1−3までに印刷対象とされる印刷用紙PM上の領域が、図4に示す先端領域を構成する。ここで、状態1−2から状態1−3の間は、用紙の後端側を紙送りローラー20gと紙送り従動ローラー20hに挟持されているものの用紙の先端側を保持されずに印刷される。従って、先端領域は、後述する膨潤カールが発生しやすいが、印刷用紙PMの中で最初に表面印刷を行われ最後に裏面印刷を行われるため、インクの乾燥時間が比較的長く確保される。また、裏面印刷の搬送では末尾に位置するため、カールが発生しても紙折れ等の不具合を生じにくい。   The area on the printing paper PM to be printed from the state 1-2 to the state 1-3 constitutes the leading end area shown in FIG. Here, during the state 1-2 to the state 1-3, the rear end side of the paper is sandwiched between the paper feed roller 20g and the paper feed driven roller 20h, but the front end side of the paper is printed without being held. . Therefore, although swelling curl, which will be described later, is likely to occur in the front end region, the ink is dried for a relatively long time because the front surface printing is performed first and the back surface printing is performed last in the printing paper PM. Further, since it is located at the end in the conveyance of the back side printing, even if the curl occurs, it is difficult to cause problems such as paper folding.

その後、印刷用紙PMは、主に紙送りローラー20gと排紙ローラー20iの順方向回転駆動により、紙送りローラー20gと紙送り従動ローラー20hの間および排紙ローラー20iと排紙従動ローラー20jの間に押圧挟持されつつ搬送され、印刷用紙PMの後端が紙送りローラー20gと紙送り従動ローラー20hの間に到達する(状態1−4)。印刷用紙PMの表面への印刷は、状態1−3から状態1−4の間も続行される。   Thereafter, the printing paper PM is driven between the paper feed roller 20g and the paper feed driven roller 20h and between the paper discharge roller 20i and the paper discharge driven roller 20j mainly by forward rotation of the paper feed roller 20g and the paper discharge roller 20i. The rear end of the printing paper PM reaches between the paper feed roller 20g and the paper feed driven roller 20h (state 1-4). Printing on the surface of the printing paper PM is continued during the state 1-3 to the state 1-4.

この状態1−3から状態1−4までに印刷対象となる印刷用紙PMの領域が図4に示す中間領域を構成する。ここで、状態1−から状態1−の間は、用紙の先端側を排紙ローラー20iと排紙従動ローラー20jに挟持され且つ後端側を紙送りローラー20gと紙送り従動ローラー20hに挟持された状態で印刷されるため、後述する膨潤カールが発生しにくい。また中間領域は用紙の真ん中に位置するため元々カールが発生しにくい。
The area of the printing paper PM to be printed from the state 1-3 to the state 1-4 constitutes an intermediate area shown in FIG. Here, in the state 1-3 to the state 1-4 , the front end side of the paper is sandwiched between the paper discharge roller 20 i and the paper discharge driven roller 20 j and the rear end side is held between the paper feed roller 20 g and the paper feed driven roller 20 h. Since printing is performed in a sandwiched state, swelling curl described later is unlikely to occur. Further, since the intermediate area is located in the middle of the sheet, it is difficult to cause curling. The area of ​​the printing paper PM to be printed from the state 1-3 to the state 1-4 separately an intermediate area shown in FIG. Here, in the state 1-3 to the state 1-4 , the front end side of the paper is sandwiched between the paper discharge roller 20 i and the paper discharge driven roller 20 j and the rear end side is held between the paper feed roller 20 g and the paper feed driven roller 20 h. Since printing is performed in a sandwiched state , swelling curl described later is unlikely to occur. Further, since the intermediate area is located in the middle of the sheet, it is difficult to cause curling.

その後、印刷用紙PMは、主に排紙ローラー20iの順方向回転駆動により、排紙ローラー20iと排紙従動ローラー20jの間に押圧挟持されつつ、少なくとも印刷用紙PMの後端(もしくは印刷用紙PMの表面の印刷領域の後端)が記録ヘッドによる記録範囲を完全に通過して離脱するまで搬送される(状態1−5)。印刷用紙PMの表面への印刷は、状態1−4から状態1−5の間も続行される。   Thereafter, the printing paper PM is pressed and held between the paper discharge roller 20i and the paper discharge driven roller 20j mainly by the forward rotation drive of the paper discharge roller 20i, and at least the print paper PM (or the print paper PM). (The rear end of the printing area on the surface) is completely conveyed through the recording range of the recording head until it leaves (state 1-5). Printing on the surface of the printing paper PM is continued from state 1-4 to state 1-5.

この状態1−4から状態1−5までに印刷対象となる印刷用紙PMの領域が図4に示す後端領域を構成する。ここで、状態1−4から状態1−5の間は、用紙の先端側を排紙ローラー20iと排紙従動ローラー20jに挟持されているものの用紙の後端側を保持されずに印刷される。従って、後端領域は、後述する膨潤カールが発生しやすい上、最後に表面印刷を行われ最初に裏面印刷を行われるためインクの乾燥時間が短く、用紙の表裏を反転した後は搬送の先端側に位置することから紙折れ等の不具合も発生しやすい。   The area of the printing paper PM to be printed from the state 1-4 to the state 1-5 constitutes the rear end area shown in FIG. Here, during the state 1-4 to the state 1-5, the front end side of the paper is sandwiched between the paper discharge roller 20i and the paper discharge driven roller 20j, but the rear end side of the paper is printed without being held. . Therefore, in the rear end area, swelling curl, which will be described later, is likely to occur, and since the front side printing is performed first and the back side printing is performed first, the drying time of the ink is short, and the front end of the conveyance after the paper is reversed Since it is located on the side, problems such as paper breakage are likely to occur.

その後、表面印刷の場合は、主に排紙ローラー20iの順方向回転駆動により、排紙ローラー20iと排紙従動ローラー20jの間に押圧挟持されつつ搬送され、排紙ローラー20iと排紙従動ローラー20jの間を抜けるとスタッカ12上に積載される。一方、両面印刷の場合は、排紙ローラー20iの逆方向回転駆動(図3では時計回り方向の回転駆動)により、後述の図5に示す反転給紙が行われる。   Thereafter, in the case of front side printing, the paper is conveyed while being pressed and held between the paper discharge roller 20i and the paper discharge driven roller 20j mainly by the forward rotation drive of the paper discharge roller 20i, and the paper discharge roller 20i and the paper discharge driven roller. After passing through 20j, it is loaded on the stacker 12. On the other hand, in the case of duplex printing, reverse paper feeding shown in FIG. 5 described later is performed by reverse rotation driving of the paper discharge roller 20i (clockwise rotation driving in FIG. 3).

《手差しトレイからの給紙》
図5は、自動用紙分離部ADF2が給紙する印刷用紙PMの搬送経路を示す図である。同図において、自動用紙分離部ADF2が給紙する印刷用紙PMの搬送経路は二点鎖線で示してある。
手差しトレイ11からの給紙が選択されると、所定の機構により分離ローラー20bに印刷用紙PMが当接され、手差しトレイ11に積載された印刷用紙PMの1枚が、分離ローラー20bの回転駆動(図5では時計回り方向への駆動)により、中間ローラー20dと中間従動ローラー20fの間に到達する。 When paper feeding from the manual feed tray 11 is selected, the printing paper PM is brought into contact with the separation roller 20b by a predetermined mechanism, and one sheet of the printing paper PM loaded on the manual feed tray 11 is rotationally driven by the separation roller 20b. (Drive in the clockwise direction in FIG. 5) reaches between the intermediate roller 20d and the intermediate driven roller 20f. なお、分離ローラー20bや印刷用紙PMを分離ローラー20bに当接させるための機構(不図示)等が自動用紙分離部ADF2を構成する。 A mechanism (not shown) for bringing the separation roller 20b and the printing paper PM into contact with the separation roller 20b constitutes the automatic paper separation unit ADF2. <Feeding from the bypass tray> <Feeding from the bypass tray>
FIG. 5 is a diagram illustrating a conveyance path of the printing paper PM fed by the automatic paper separation unit ADF2. In the figure, the conveyance path of the printing paper PM fed by the automatic paper separation unit ADF2 is indicated by a two-dot chain line. FIG. 5 is a diagram illustrating a utilizing path of the printing paper PM fed by the automatic paper separation unit ADF2. In the figure, the utilizing path of the printing paper PM fed by the automatic paper separation unit ADF2 is indicated by a two- dot chain line.
When paper feed from the manual feed tray 11 is selected, the printing paper PM is brought into contact with the separation roller 20b by a predetermined mechanism, and one sheet of the printing paper PM stacked on the manual feed tray 11 is driven to rotate the separation roller 20b. (Driving in the clockwise direction in FIG. 5) reaches between the intermediate roller 20d and the intermediate driven roller 20f. Note that a mechanism (not shown) for bringing the separation roller 20b and the printing paper PM into contact with the separation roller 20b constitutes the automatic paper separation unit ADF2. When paper feed from the manual feed tray 11 is selected, the printing paper PM is brought into contact with the separation roller 20b by a predetermined mechanism, and one sheet of the printing paper PM stacked on the manual feed tray 11 is driven to rotate the separation roller 20b. (Driving in the clockwise direction in FIG. 5) reaches between the intermediate roller 20d and the intermediate driven roller 20f. Note that a mechanism (not shown) for bringing the separation roller 20b and the printing paper PM into contact with the separation roller 20b forms the automatic paper separation unit ADF2.

さらに、主に中間ローラー20dの順方向回転駆動により、印刷用紙PMは、中間ローラー20dと中間従動ローラー20fの間に押圧挟持されつつ搬送され、先端が紙送りローラー20gと紙送り従動ローラー20hの間に到達する。なお、この状態は上述した給紙カセット10から給紙された印刷用紙PMの状態1−2と同様であり、状態1−2以後は、上述した給紙カセット10から給紙された印刷用紙PMと同様の搬送が行われる。   Further, the printing paper PM is conveyed while being pressed and sandwiched between the intermediate roller 20d and the intermediate driven roller 20f mainly by the forward rotation drive of the intermediate roller 20d, and the leading ends of the paper feeding roller 20g and the paper feeding driven roller 20h. Reach between. This state is the same as the state 1-2 of the printing paper PM fed from the paper feeding cassette 10 described above, and after the state 1-2, the printing paper PM fed from the paper feeding cassette 10 described above. The same conveyance is performed.

《反転給紙》
次に、両面印刷を行う場合の用紙反転ならびに反転した用紙への印刷について説明する。
図6は、反転給紙経路を示す図である。同図に置いて、反転給紙経路は二点鎖線で示してある。反転給紙が開始されると、印刷用紙PMは、排紙ローラー20iの逆方向回転駆動(図6では時計周り方向の回転駆動)により、排紙ローラー20iと排紙従動ローラー20jとの間に押圧挟持されつつ搬送され、後端が紙送りローラー20gと紙送り従動ローラー20hの間に到達し、後端が紙送りローラー20gと紙送り従動ローラー20hとの間に挟持された状態となる。
<Reverse Feeding>
Next, paper reversal and printing on the reversed paper when performing duplex printing will be described.
FIG. 6 is a diagram illustrating the reverse feeding path. In the figure, the reverse feeding path is indicated by a two-dot chain line. When reverse paper feeding is started, the printing paper PM is moved between the paper discharge roller 20i and the paper discharge driven roller 20j by the reverse rotation drive of the paper discharge roller 20i (clockwise rotation in FIG. 6). The paper is conveyed while being pressed and sandwiched, the rear end reaches between the paper feed roller 20g and the paper feed driven roller 20h, and the rear end is held between the paper feed roller 20g and the paper feed driven roller 20h. FIG. 6 is a diagram illustrating the reverse feeding path. In the figure, the reverse feeding path is indicated by a two-dot chain line. When reverse paper feeding is started, the printing paper PM is moved between the paper discharge roller 20i and the paper discharge driven roller 20j by the reverse rotation drive of the paper discharge roller 20i (clockwise rotation in FIG. 6). The paper is transmitted while being pressed and sandwiched, the rear end reaches between the paper feed roller 20g and the paper feed. driven roller 20h, and the rear end is held between the paper feed roller 20g and the paper feed driven roller 20h.

図7は、紙送りローラー20gと紙送り従動ローラー20hの押圧方向を説明する図である。なお、図7では、印刷用紙PMを一点鎖線で示しており、図7以後の図でも印刷用紙PMを図面に示す場合は一点鎖線で示すことにする。図7に示すように、紙送りローラー20gと紙送り従動ローラー20hの印刷用紙PMに対する押圧方向は、図中の上下鉛直方向から反時計回りに傾いており、紙送りローラー20gと紙送り従動ローラー20hとの間に挟持された部位よりプラテン側にある印刷用紙PMがプラテンの表面に押し付けられた状態になる。このとき、印刷用紙PMは図中下向きに反り、当該反りの現れる箇所に重複する部位に後述のデカール効果が現れ、当該反りの現れる箇所にデカール対象となる箇所を位置させた状態を待機位置Aと呼ぶ。   FIG. 7 is a diagram illustrating the pressing directions of the paper feed roller 20g and the paper feed driven roller 20h. In FIG. 7, the printing paper PM is indicated by a one-dot chain line, and in the drawings subsequent to FIG. 7, the printing paper PM is indicated by a one-dot chain line. As shown in FIG. 7, the pressing direction of the paper feeding roller 20g and the paper feeding driven roller 20h against the printing paper PM is inclined counterclockwise from the vertical direction in the figure, and the paper feeding roller 20g and the paper feeding driven roller. The printing paper PM on the side of the platen from the portion sandwiched between 20h is pressed against the surface of the platen. At this time, the printing paper PM is warped downward in the figure, and a decurling effect described later appears in a portion overlapping the portion where the warp appears, and a state where the portion to be decurled is located in the portion where the warp appears is the standby position A. Call it.

次に、印刷用紙PMは、主に排紙ローラー20iと紙送りローラー20gと中間ローラー20dの逆方向回転駆動により、排紙ローラー20iと排紙従動ローラー20jの間および紙送りローラー20gと紙送り従動ローラー20hの間に押圧挟持されつつ搬送され、途中からは紙送りローラー20gと紙送り従動ローラー20hの間に押圧挟持されつつ搬送されて後端が中間ローラー20dと中間従動ローラー20eの間に到達し、さらに、中間ローラー20dと中間従動ローラー20eの間に押圧挟持されつつ搬送されて後端が中間ローラー20dと中間従動ローラー20fの間に到達する。このように搬送される中で、印刷用紙PMが中間ローラー20dに巻きかかった状態が発生するが、このとき、中間従動ローラー20eと中間従動ローラー20fの少なくとも一方によって印刷用紙PMの特定領域を中間ローラー20dの曲面に押しつけた状態を待機位置Bと呼ぶ。なお、特定領域は、上述した中間領域,後端領域,先端領域の何れかを指す。   Next, the printing paper PM is driven between the paper discharge roller 20i and the paper discharge driven roller 20j and the paper feed roller 20g and the paper feed mainly by reverse rotation driving of the paper discharge roller 20i, the paper feed roller 20g, and the intermediate roller 20d. It is conveyed while being pressed and clamped between the driven rollers 20h, and is conveyed while being pressed and clamped between the paper feeding roller 20g and the paper feeding driven roller 20h, and the rear end is between the intermediate roller 20d and the intermediate driven roller 20e. Furthermore, it is conveyed while being pressed and clamped between the intermediate roller 20d and the intermediate driven roller 20e, and the rear end reaches between the intermediate roller 20d and the intermediate driven roller 20f. While being conveyed in this way, a state occurs in which the printing paper PM is wound around the intermediate roller 20d. At this time, a specific region of the printing paper PM is intermediated by at least one of the intermediate driven roller 20e and the intermediate driven roller 20f. The state pressed against the curved surface of the roller 20d is called a standby position B. The specific area refers to any of the above-described intermediate area, rear end area, and front end area.

その後、印刷用紙PMは、主に中間ローラー20dの逆方向回転駆動により、中間ローラー20dと中間従動ローラー20eの間および中間ローラー20dと中間従動ローラー20fの間に押圧挟持されつつ搬送されて後端が紙送りローラー20gと紙送り従動ローラー20hの間に到達する。このようにして紙送りローラー20gと紙送り従動ローラー20hの間まで搬送された印刷用紙PMは、先に印刷されたときと表裏が反転して裏面を上に向けており、紙送りローラー20gと紙送り従動ローラー20hによって印刷用紙PMを徐々に左方に送る副走査を行いつつキャリッジを適宜に移動させながら記録ヘッドから適宜にインクを吐出することにより、印刷用紙PMの裏面に対して印刷を行う。   Thereafter, the printing paper PM is conveyed while being pressed and sandwiched between the intermediate roller 20d and the intermediate driven roller 20e and between the intermediate roller 20d and the intermediate driven roller 20f mainly by the reverse rotation driving of the intermediate roller 20d. Reaches between the paper feed roller 20g and the paper feed driven roller 20h. In this way, the printing paper PM conveyed between the paper feed roller 20g and the paper feed driven roller 20h has the reverse side upside down when printed first, and the back side faces up. Printing is performed on the back surface of the printing paper PM by appropriately ejecting ink from the recording head while appropriately moving the carriage while performing sub-scanning that gradually sends the printing paper PM to the left by the paper feed driven roller 20h. Do.

以上のように、印刷用紙PMの裏表を反転させる際に利用される中間ローラー20dは、本実施形態において反転ローラーを構成する。なお、以上説明した各状態や各待機位置に印刷用紙PMを搬送する際に利用されるローラーは、印刷用紙PMの長さに応じて異なってくることは言うまでもない。 As described above, the intermediate roller 20d used when reversing the front and back of the printing paper PM constitutes a reversing roller in the present embodiment. Needless to say, the roller used when transporting the printing paper PM to each state and each standby position described above varies depending on the length of the printing paper PM.

《膨潤カール発生理由と待機の必要性》
図8は、印刷用紙PMに発生する膨潤カールの説明図である。 FIG. 8 is an explanatory diagram of swelling curls generated on the printing paper PM. 図8(a)に示すように、反転給紙経路に送られる印刷用紙PMは、直前に行われた表面に対する印刷によって表面にインクが付着され、図8(b)に示すように、表面が膨潤して膨潤カールが起こる。 As shown in FIG. 8 (a), the printing paper PM sent to the reverse paper feed path has ink adhered to the surface due to the printing on the surface immediately before, and as shown in FIG. 8 (b), the surface surface becomes It swells and causes swelling curl. そのため、図8(c)に示すように、用紙反転した後で裏面に印刷を行う際にプラテン20k上で浮き上がることがあり、裏面印刷品質に影響を与える。 Therefore, as shown in FIG. 8C, when printing on the back surface after reversing the paper, it may float on the platen 20k, which affects the back surface printing quality. 具体的には、例えば、記録ヘッドと擦れることで汚れたり、接触して紙折れしたり、記録ヘッドと印刷用紙PM表面との距離変動による印刷ムラ、等が発生する可能性がある。 Specifically, for example, rubbing against the recording head may cause stains, contact with the recording head may cause the paper to fold, or printing unevenness may occur due to fluctuations in the distance between the recording head and the surface of the printing paper PM. むろん、反転給紙の際に先頭で搬送される印刷用紙PMの後端側で膨潤カールが発生すると、記録ヘッド以外の部材と搬送経路中で干渉して同様の擦れ、汚れ、紙折れ等が発生する可能性もある。 Of course, if swelling curl occurs on the rear end side of the printing paper PM that is transported at the beginning during reverse paper feeding, it interferes with members other than the recording head in the transport path, causing similar rubbing, dirt, and paper folds. It can also occur. このような裏面印刷品質の低下を防止するため、本実施形態では、反転給紙経路上の所定位置で後述の待機を行う。 In order to prevent such deterioration of the backside print quality, in the present embodiment, the standby described later is performed at a predetermined position on the reverse paper feed path. 《Reason for swelling curl and necessity of waiting》 《Reason for swelling curl and necessity of waiting》
FIG. 8 is an explanatory diagram of swelling curls that occur in the printing paper PM. As shown in FIG. 8 (a), the printing paper PM sent to the reversal paper feed path has ink adhered to the surface by printing on the surface performed immediately before, and the surface has a surface as shown in FIG. 8 (b). Swelling and swelling curl occurs. Therefore, as shown in FIG. 8C, when printing on the back side after paper reversal, it may float on the platen 20k, affecting the back side print quality. More specifically, for example, there is a possibility that the recording head is soiled by rubbing with the recording head, paper breaks due to contact, printing unevenness due to a variation in the distance between the recording head and the surface of the printing paper PM, and the like. Of course, when swelling curl occurs on the rear end side of the printing paper PM conveyed at the top during reversal paper feeding, it interferes with members other than the recording head in the convey FIG. 8 is an explanatory diagram of swelling curls that occur in the printing paper PM. As shown in FIG. 8 (a), the printing paper PM sent to the reversal paper feed path has ink adhered to the surface by printing on the surface performed immediately before, and the surface has a surface as shown in FIG. 8 (b). Swelling and swelling curl occurs. Therefore, as shown in FIG. 8C, when printing on the back side after paper reversal, it may float on the platen 20k, affecting the back side print quality. More specifically, for example, there is a possibility that the recording head is soiled by rubbing with the recording head, paper breaks due to contact, printing unevenness due to a variation in the distance between the recording head and the surface of the printing paper PM, and the like. Of course, when swelling curl occurs on the rear end side of the printing paper PM transmitted at the top during reversal paper feeding, it interferes with members other than the recording head in the convey ance path, causing similar rubbing, dirt, paper breakage, etc. It may occur. In order to prevent such lowering of the back surface printing quality, in the present embodiment, a standby state described later is performed at a predetermined position on the reverse feeding path. ance path, causing similar rubbing, dirt, paper breakage, etc. It may occur. In order to prevent such lowering of the back surface printing quality, in the present embodiment, a standby state described later is performed at a predetermined position on the reverse feeding path.

《印刷装置の電気的構成》
図9は、プリンター100の制御にかかる電気的・ソフトウェア的構成を示すブロック図である。 FIG. 9 is a block diagram showing an electrical / software configuration for controlling the printer 100. なお、同図には後述の搬送待機に関係する構成を示しており、その他の印刷制御にかかる構成は本発明の要旨を逸脱しない範囲で公知技術から適宜に採用することができる。 Note that the figure shows a configuration related to transport standby, which will be described later, and other configurations related to print control can be appropriately adopted from known techniques without departing from the gist of the present invention. 同図において、プリンター100は、プリンター100の全体を制御部30と、記憶部31と、I/F32と、キャリッジモーター33と、記録ヘッド14aと、搬送モーター34と、紙検出センサー20lと、を備えている。 In the figure, the printer 100 includes a control unit 30, a storage unit 31, an I / F 32, a carriage motor 33, a recording head 14a, a transport motor 34, and a paper detection sensor 20l for the entire printer 100. I have. 記憶部31には、各領域毎に、インク打込量の大小に応じて決定される待機位置との対応関係が記憶されている。 The storage unit 31 stores the correspondence relationship with the standby position determined according to the magnitude of the ink injection amount for each area. I/F32にはホスト装置が接続されており、プリンター100は、当該ホスト装置から入力される印刷データに基づいて印刷を行ったり、当該ホスト装置からの指示により片面印刷と両面印刷との切換え等の印刷設定が行われたりする。 A host device is connected to the I / F 32, and the printer 100 prints based on the print data input from the host device, switches between single-sided printing and double-sided printing according to an instruction from the host device, and the like. Print settings are made. << Electrical configuration of printing device >> << Electrical configuration of printing device >>
FIG. 9 is a block diagram showing an electrical / software configuration for controlling the printer 100. FIG. 2 shows a configuration related to conveyance standby, which will be described later, and other configurations related to printing control can be appropriately adopted from known techniques without departing from the gist of the present invention. In the figure, the printer 100 includes a control unit 30, a storage unit 31, an I / F 32, a carriage motor 33, a recording head 14a, a conveyance motor 34, and a paper detection sensor 20l. I have. The storage unit 31 stores, for each region, a correspondence relationship with a standby position that is determined in accordance with the amount of ink applied. A host device is connected to the I / F 32, and the printer 100 performs printing based on print data input from the host device, or switches between single-sided printing and double-sided printing according to an instruction from the host device. Print settings are made. FIG. 9 is a block diagram showing an electrical / software configuration for controlling the printer 100. FIG. 2 shows a configuration related to communicating standby, which will be described later, and other configurations related to printing control can be appropriately adopted from known techniques Without departing from the gist of the present invention. In the figure, the printer 100 includes a control unit 30, a storage unit 31, an I / F 32, a carriage motor 33, a recording head 14a, a utilizing motor 34, and a paper detection sensor 20l. I have. The storage unit 31 stores, for each region, a correspondence relationship with a standby position that is determined in accordance with the amount of ink applied. A host device is connected to the I / F 32, Print settings are made. And the printer 100 performs printing based on print data input from the host device, or switches between single-sided printing and double-sided printing according to an instruction from the host device.

制御部30は、プリンター100の全体を制御するものであり、例えば、ROMに記憶された制御プログラムをRAMに展開しつつCPUが演算を行うことによりソフトウェア的に実現されてもよいし、ASIC(Application Specific Integrated Circuit)等のようにハードウェア的に実現されてもよい。制御部30は、例えば、制御プログラムを実行することにより、記憶部31と、I/F32と、キャリッジモーター33と、記録ヘッド14aと、搬送モーター34と、紙検出センサー20lとを制御し、以下の搬送制御処理を実行する。   The control unit 30 controls the entire printer 100. For example, the control unit 30 may be realized as software by causing the CPU to perform an operation while developing a control program stored in the ROM in the RAM, or may be implemented by software. Application Specific Integrated Circuit) may be realized in hardware. The control unit 30 controls, for example, the storage unit 31, the I / F 32, the carriage motor 33, the recording head 14a, the transport motor 34, and the paper detection sensor 20l by executing a control program. The conveyance control process is executed.

(2)搬送制御処理:
図10は、搬送制御処理の流れを示すフローチャートである。当該処理は、印刷が指示されたときに実行される。処理が開始されると両面印刷か否かを判断する(S10)。ここで、指示された印刷が片面印刷の場合は(S10;No)通常の搬送制御処理を行い(S90)、表面に対する印刷が完了すると、排紙ローラー20iの駆動により、印刷用紙PMがスタッカ12に排出されて積層される(S80)。一方、指示された印刷が両面印刷の場合は(S10:Yes)、まず、表面印刷について通常の搬送制御処理を行う(S20)。
(2) Transport control processing:
FIG. 10 is a flowchart showing the flow of the conveyance control process. This process is executed when printing is instructed. When the process is started, it is determined whether or not double-sided printing is performed (S10). Here, when the instructed printing is single-sided printing (S10; No), normal conveyance control processing is performed (S90), and when printing on the front surface is completed, the printing paper PM is loaded into the stacker 12 by driving the paper discharge roller 20i. And are stacked (S80). On the other hand, if the instructed printing is double-sided printing (S10: Yes), first, normal conveyance control processing is performed for front-side printing (S20). FIG. 10 is a flowchart showing the flow of the utilizing control process. This process is executed when printing is instructed. When the process is started, it is determined whether or not double-sided printing is performed (S10). Here, when the instructed printing is single-sided printing (S10; No), normal sintering control processing is performed (S90), and when printing on the front surface is completed, the printing paper PM is loaded into the stacker 12 by driving the paper discharge roller 20i And are stacked (S80). On the other hand, if the instructed printing is double-sided printing (S10: Yes), first, normal flowcharting control processing is performed for front-side printing (S20).

その間/その前後いずれか/またはこれらの任意の組み合わせのタイミングで、上述した中間領域,後端領域,先端領域のそれぞれについて表面の印刷におけるインク打込量を取得する(S30)。インク打込量は、各領域に付着されるインク量を合計して平均化することにより求めてもよいが、推定値として求めてもよく、例えば、公知の各種の手法によって計算されるインクカバレッジ量をインク打ち込み量として利用してもよい。また、なお、当該インク打込量は、印刷の指示を当該プリンター100に行うホスト装置(不図示)において予め算出し、当該ホスト装置からプリンター100に送信されるようにしてもよい。当該ステップS39を実行する制御部30が本実施形態において判定手段を構成する。   In the meantime, either before or after that / or any combination of these timings, the amount of ink applied in surface printing is acquired for each of the intermediate region, the rear end region, and the front end region (S30). The ink placement amount may be obtained by summing and averaging the amount of ink attached to each region, but may be obtained as an estimated value, for example, ink coverage calculated by various known methods. The amount may be used as the ink hit amount. The ink ejection amount may be calculated in advance in a host device (not shown) that issues a print instruction to the printer 100 and transmitted from the host device to the printer 100. In this embodiment, the control unit 30 that executes step S39 constitutes a determination unit.

次に、インク打込量に基づいて待機位置を決定する(S40)。
図11は、各領域におけるインク打込量と待機位置との対応関係を説明する図である。図11に示す対応関係に相当するデータは、例えば、記憶部31に記憶されている。
本実施形態においては、後端領域の単位面積あたりのインク打込量Dbを、高デューティーと、中デューティーと、低デューティーの3つに分類し、分類結果に基づき、後端領域を含む印刷用紙PMの部位を、待機位置Aにおいて待機させるか、待機位置Bにおいて待機させるか、待機を行わないか、のいずれかに決定する。 In the present embodiment, the ink injection amount Db per unit area of ​​the rear end region is classified into three types, high duty, medium duty, and low duty, and based on the classification result, the printing paper including the rear end region is included. It is determined whether the PM portion is made to stand by at the standby position A, is made to wait at the standby position B, or is not made to wait. ここで、後端領域については、高デューティーと中デューティーの閾値をVとし、中デューティーと低デューティーの閾値をWとする。 Here, for the rear end region, the threshold value of high duty and medium duty is V, and the threshold value of medium duty and low duty is W. Next, a standby position is determined based on the ink placement amount (S40). Next, a standby position is determined based on the ink placement amount (S40).
FIG. 11 is a diagram for explaining the correspondence between the ink placement amount and the standby position in each region. Data corresponding to the correspondence shown in FIG. 11 is stored in the storage unit 31, for example. FIG. 11 is a diagram for explaining the correspondence between the ink placement amount and the standby position in each region. Data corresponding to the correspondence shown in FIG. 11 is stored in the storage unit 31, for example.
In the present embodiment, the ink placement amount Db per unit area of the trailing edge region is classified into three types of high duty, medium duty, and low duty, and based on the classification result, printing paper including the trailing edge region The PM part is determined to either wait at the standby position A, wait at the standby position B, or not wait. Here, for the rear end region, the threshold values for the high duty and the medium duty are set to V, and the threshold values for the medium duty and the low duty are set to W. In the present embodiment, the ink placement amount Db per unit area of ​​the trailing edge region is classified into three types of high duty, medium duty, and low duty, and based on the classification result, printing paper including the trailing edge region The PM part is determined to either wait at the standby position A, wait at the standby position B, or not wait. Here, for the rear end region, the threshold values ​​for the high duty and the medium duty are set to V, and the threshold values ​​for the medium duty and the low duty are set to W.

また、中間領域の単位面積あたりのインク打込量Daは、高デューティーと、中・低デューティーの2つに分類し、分類結果に基づき、中間領域を含む印刷用紙PMの部位を、待機位置Bにおいて待機させるか、待機を行わないか、のいずれかに決定する。ここで、中間領域については、高デューティーと中・低デューティーの閾値をとする。なお、中間領域は後述するようにインク打込量Daが多くても後端領域や先端領域に比べて膨潤カールによる影響が小さいため、後端領域や下記の先端領域よりも分類数を少なくし、高デューティーであってもデカール効果が低めの待機位置としてある。
Further, the ink placement amount Da per unit area of the intermediate area is classified into two, high duty and medium / low duty. Based on the classification result, the portion of the printing paper PM including the intermediate area is set to the standby position B. It is determined whether to wait or not to wait. Here, for the intermediate region, the threshold values of high duty and medium / low duty are X. As will be described later, since the influence of the swelling curl is small in the intermediate area as compared with the rear end area and the front end area even if the ink hit amount Da is large, the number of classifications is smaller than that in the rear end area and the following front end area. Even when the duty is high, the decurling effect is a low standby position. Further, the ink placement amount Da per unit area of ​​the intermediate area is classified into two, high duty and medium / low duty. Based on the classification result, the portion of the printing paper PM including the intermediate area is set to the standby position B. It is determined whether to wait or not to wait. Here, for the intermediate region, the threshold values ​​of high duty and medium / low duty are X. As will be described later, since the influence of the swelling curl is small in The intermediate area as compared with the rear end area and the front end area even if the ink hit amount Da is large, the number of classifications is smaller than that in the rear end area and the following front end area. Even when the duty is high, the decurling effect is a low standby position.

また、先端領域の単位面積あたりのインク打込量Dcは、高デューティーと、中デューティーと、低デューティーの3つに分類し、分類結果に基づき、先端領域を含む印刷用紙PMの部位を、待機位置Aにおいて待機させるか、待機位置Bにおいて待機させるか、待機を行わないか、のいずれかに決定する。ここで、先端領域については、高デューティーと中デューティーの閾値をYとし、中デューティーと低デューティーの閾値をZとする。   Further, the ink placement amount Dc per unit area of the leading edge region is classified into three types of high duty, medium duty, and low duty, and the portion of the printing paper PM including the leading edge region is placed on standby based on the classification result. It is determined whether to wait at the position A, to wait at the standby position B, or not to wait. Here, for the tip region, the threshold values for high duty and medium duty are Y, and the threshold values for medium duty and low duty are Z.

図12は、後端領域のインク打込量DbがVよりも大きい場合の印刷用紙PMの待機状態を示す図である。同図に示すように、後端領域を待機位置Aにて待機させると、図4で示した印刷用紙PMの末尾側の端部が紙送りローラー20gと紙送り従動ローラー20hとの間に挟持された状態で待機されることになる。後端領域は、表面印刷において搬送の末尾側に位置し、その後の反転給紙では搬送の先頭側に位置するためである。そして、後端領域は、紙送りローラー20gと紙送り従動ローラー20hの挟持位置よりもプラテン20k側にある印刷用紙PMが下向きに反ることになる。すなわち、表面印刷においてインクの膨潤によりカールした向きと逆向きの反りが、後端領域に発生する。   FIG. 12 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount Db in the rear end region is larger than V. As shown in the figure, when the rear end area is made to stand by at the standby position A, the end of the printing paper PM shown in FIG. 4 is sandwiched between the paper feed roller 20g and the paper feed driven roller 20h. It will wait in the state where it was done. This is because the rear end region is located on the trailing side of the conveyance in the front surface printing, and is located on the leading side of the conveyance in the subsequent reverse feeding. In the rear end region, the printing paper PM on the side of the platen 20k from the holding position of the paper feeding roller 20g and the paper feeding driven roller 20h is warped downward. That is, a warp in the direction opposite to the curled direction due to the swelling of the ink in the surface printing occurs in the rear end region.

図13は、後端領域のインク打込量DbがVよりも小さくWよりも大きい場合の印刷用紙PMの待機状態を示す図である。同図に示すように、後端領域を待機位置Bにて待機させると、図4で示した印刷用紙PMの後端側の端部が中間ローラー20dと中間従動ローラー20eにより押圧挟持される。そして、後端領域には、中間ローラー20dの曲面に沿った反りが発生し、この反りは、表面印刷においてインクの膨潤によりカールした向きと逆向きの反りである。   FIG. 13 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount Db in the rear end region is smaller than V and larger than W. As shown in the figure, when the rear end region is put on standby at the standby position B, the end of the printing paper PM shown in FIG. 4 is pressed and held between the intermediate roller 20d and the intermediate driven roller 20e. Then, a warp along the curved surface of the intermediate roller 20d occurs in the rear end region, and this warp is a warp opposite to the direction curled by the swelling of the ink in the surface printing.

図14は、中間領域のインク打込量Daがよりも大きい場合の印刷用紙PMの待機状態を示す図である。同図に示すように、中間領域を待機位置Bにて待機させると、図4で示した後端領域と中間領域の境界付近が中間ローラー20dと中間従動ローラー20fにより押圧挟持され、中間領域と先端領域の境界付近が中間ローラー20dと中間従動ローラー20eにより押圧挟持される。そして、中間領域には、中間ローラー20dの曲面に沿った反りが発生し、この反りは、表面印刷においてインクの膨潤によりカールした向きと逆向きの反りである。
FIG. 14 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount Da in the intermediate area is larger than X. As shown in the figure, when the intermediate region is made to stand by at the standby position B, the vicinity of the boundary between the rear end region and the intermediate region shown in FIG. 4 is pressed and clamped by the intermediate roller 20d and the intermediate driven roller 20f. The vicinity of the boundary of the tip region is pressed and clamped by the intermediate roller 20d and the intermediate driven roller 20e. Then, a warp along the curved surface of the intermediate roller 20d occurs in the intermediate region, and this warp is a warp opposite to the direction curled by the swelling of the ink in the surface printing. FIG. 14 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount Da in the intermediate area is larger than X. As shown in the figure, when the intermediate region is made to stand by at the standby position B 4, the intermediate of the boundary between the rear end region and the intermediate region shown in FIG. 4 is pressed and clamped by the intermediate roller 20d and the intermediate driven roller 20f. The vicinity of the boundary of the tip region is pressed and clamped by The intermediate roller 20d and the intermediate driven roller 20e. Then, a warp along the curved surface of the intermediate roller 20d occurs in the intermediate region, and this warp is a warp opposite to the direction curled by the swelling of the ink in the surface printing.

図15は、先端領域のインク打込量DcがYよりも大きい場合の印刷用紙PMの待機状態を示す図である。同図に示すように、先端領域を待機位置Aにて待機させると、図4で示した印刷用紙PMの中間領域と先端領域の境界付近が紙送りローラー20gと紙送り従動ローラー20hとの間に挟持された状態で待機されることになる。中間領域は、表面印刷において搬送の先頭側に位置し、その後の反転給紙では搬送の末尾側に位置するためである。そして、先端領域は、紙送りローラー20gと紙送り従動ローラー20hの挟持位置よりもプラテン20k側にある印刷用紙PMが下向きに反ることになる。すなわち、表面印刷においてインクの膨潤によりカールした向きと逆向きの反りが、先端領域に発生する。   FIG. 15 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount Dc in the leading end region is larger than Y. As shown in the figure, when the front end area is made to stand by at the standby position A, the vicinity of the boundary between the intermediate area and the front end area of the printing paper PM shown in FIG. 4 is between the paper feed roller 20g and the paper feed driven roller 20h. It will be waited in the state pinched by. This is because the intermediate region is located on the leading side of the conveyance in the front surface printing and is located on the trailing side of the conveyance in the subsequent reverse feeding. In the leading end region, the printing paper PM on the platen 20k side of the holding position between the paper feed roller 20g and the paper feed driven roller 20h is warped downward. That is, a warp in the direction opposite to the curled direction due to the swelling of the ink in the surface printing occurs in the tip region.

図16は、先端領域のインク打込量DcがYよりも小さくZよりも大きい場合の印刷用紙PMの待機状態を示す図である。同図に示すように、先端領域を待機位置Bにて待機させると、図4で示した印刷用紙PMの先端領域が中間ローラー20dと中間従動ローラー20eにより押圧挟持される。そして、先端領域には、中間ローラー20dの曲面に沿った反りが発生し、この反りは、表面印刷においてインクの膨潤によりカールした向きと逆向きの反りである。   FIG. 16 is a diagram illustrating a standby state of the printing paper PM when the ink placement amount Dc in the leading end region is smaller than Y and larger than Z. As shown in the figure, when the leading end region is made to stand by at the standby position B, the leading end region of the printing paper PM shown in FIG. 4 is pressed and sandwiched between the intermediate roller 20d and the intermediate driven roller 20e. Then, a warp along the curved surface of the intermediate roller 20d occurs in the tip region, and this warp is a warp opposite to the direction curled by the swelling of the ink in the surface printing.

すなわち、同じ部位であってもインク打ち込み量が多いほどデカール効果の高い位置にて待機を行い、インク打ち込み量が同じであっても用紙の搬送方向において端部を含んで形成される領域は用紙の端部を含まずに形成される領域よりもデカール効果の高い位置にて待機を行うようになっている。   In other words, even if the amount of ink shot is the same, the standby is performed at a position where the decurling effect is higher as the amount of ink shot is larger. The stand-by operation is performed at a position where the decurling effect is higher than that of the region formed without including the end portion.

ここで、デカール効果とは、用紙に発生した反りを解消する効果のことであり、基本的には、用紙に発生した反りに対して逆の反りを発生させることにより紙に発生した反り(カール)を解消(デカール)する効果を指す。すなわち、待機位置A,Bでは用紙に発生した反りと逆方向の反りが発生する。ただし、このデカール効果の度合いはその他の要因にも依存し、例えば、用紙に発生した反りと逆向きに発生された反りの曲率、当該反りを維持させる支持部材が紙を抑える圧力、当該支持部材が用紙の幅方向(用紙の搬送方向に直交する方向)において押圧する範囲、に応じて変化する。   Here, the decurling effect is an effect that eliminates the warp that has occurred on the paper. Basically, the warp that has occurred on the paper by curling the warp that is opposite to the warp that has occurred on the paper (curl). ) Refers to the effect of eliminating (decaling). In other words, at the standby positions A and B, a warp in the opposite direction to the warp generated on the paper occurs. However, the degree of the decurling effect depends on other factors, for example, the curvature of the warp generated in the opposite direction to the warp generated on the paper, the pressure at which the support member for maintaining the warp suppresses the paper, the support member Changes in accordance with the range of pressing in the paper width direction (direction perpendicular to the paper transport direction).

図17は、デカール効果と、用紙に発生した反りに対して逆向きに発生された反りの曲率と、の関係を説明する図である。同図(a)に示す待機位置Aにおける印刷用紙PMに発生する反りの曲率Raは、同図(b)に示す待機位置Bにおける印刷用紙PMに発生する反りの曲率Rbよりも大きく、用紙に発生した反りの曲率に応じたデカール効果は待機位置Aよりも待機位置Bの方が強くなっている。すなわち、デカール効果は、用紙に発生した反りと逆向きに発生された反りの曲率が小さいほど強く、用紙に発生した反りと逆向きに発生された反りの曲率が大きいほどほど弱くなる。ただし、後述の用紙に発生した反りを維持させる支持部材が紙を抑える圧力や、用紙に発生した反りを維持させる支持部材が用紙の幅方向において押圧する範囲に応じたデカール効果との兼ね合いで、結果として待機位置Aの方が待機位置Bよりもデカール効果が強くなる。   FIG. 17 is a diagram for explaining the relationship between the decurling effect and the curvature of the warp generated in the opposite direction to the warp generated on the paper. The curvature curvature Ra of the printing paper PM at the standby position A shown in FIG. 9A is larger than the curvature Rb of the curvature of the printing paper PM at the standby position B shown in FIG. The decurling effect corresponding to the curvature of the generated warp is stronger at the standby position B than at the standby position A. That is, the decurling effect is stronger as the curvature of the warp generated in the direction opposite to the warp generated on the paper is smaller, and is decreased as the curvature of the warp generated in the direction opposite to the warp generated on the paper is larger. However, in balance with the decurling effect according to the pressure that the supporting member that maintains the warp generated in the paper described later suppresses the paper and the support member that maintains the warp generated in the paper presses in the width direction of the paper, As a result, the standby position A has a stronger decurling effect than the standby position B.

図18は,デカール効果と、用紙に発生した反りを維持させる支持部材が紙を抑える圧力と、の関係を説明する図である。同図(a)に示す待機位置Aにおける印刷用紙PMを挟持している紙送りローラー20gと紙送り従動ローラー20hとが印刷用紙PMを挟持する圧力Paは、同図(b)に示す待機位置Bにおける印刷用紙PMを挟持している中間ローラー20dと中間従動ローラー20eもしくは中間ローラー20dと中間従動ローラー20fとが印刷用紙PMを挟持する圧力Pbよりも強く、用紙に発生した反りを維持させる支持部材が紙を抑える圧力に応じたデカール効果は、待機位置Bよりも待機位置Aの方が強くなっている。すなわち、デカール効果は、用紙に発生した反りを維持させる支持部材が紙を抑える圧力が強いほど強く、用紙に発生した反りを維持させる支持部材が紙を抑える圧力が弱いほど弱くなる。   FIG. 18 is a diagram for explaining the relationship between the decurling effect and the pressure at which the supporting member that maintains the warp generated on the paper suppresses the paper. The pressure Pa at which the paper feed roller 20g and the paper feed driven roller 20h holding the printing paper PM at the standby position A shown in FIG. 9A holds the printing paper PM is the standby position shown in FIG. The intermediate roller 20d and the intermediate driven roller 20e holding the printing paper PM in B or the intermediate roller 20d and the intermediate driven roller 20f are stronger than the pressure Pb for holding the printing paper PM, and support for maintaining the warp generated on the paper The decurling effect corresponding to the pressure with which the member holds the paper is stronger at the standby position A than at the standby position B. In other words, the decurling effect becomes stronger as the supporting member for maintaining the warp generated on the paper has a higher pressure for suppressing the paper and becomes weaker as the pressure for the supporting member for maintaining the warp generated on the paper to suppress the paper is weaker.

図19は、デカール効果と、用紙に発生した反りを維持させる支持部材が用紙の幅方向において押圧する範囲と、の関係を説明する図である。同図に示すように、待機位置Aの紙送りローラー20gや待機位置Bの中間ローラー20dは印刷用紙PMの全範囲に当接する幅を有しているが、待機位置Aの紙送り従動ローラー20hは印刷用紙PMの一部に当接するローラーを用紙の幅方向に複数コマ配置して印刷用紙PMを押圧しているのに対し、待機位置Bにかかる中間従動ローラー20eや中間従動ローラー20fは印刷用紙PMの一部に当接するローラーを略中央位置に1コマだけ配置して印刷用紙PMを押圧している。すなわち、用紙に発生した反りを維持させる支持部材の用紙の幅方向において押圧する範囲は、待機位置Bよりも待機位置の方が広くなっている。その結果、用紙に発生した反りを維持させる支持部材が用紙の幅方向において押圧する範囲に応じたデカール効果は、待機位置Bよりも待機位置Aの方が強くなる。すなわち、デカール効果は、用紙に発生した反りを維持させる支持部材が用紙の幅方向において押圧する範囲が広いほど強く、用紙に発生した反りを維持させる支持部材が用紙の幅方向において押圧する範囲が狭いほど弱くなる。
FIG. 19 is a diagram for explaining the relationship between the decurling effect and the range in which the support member that maintains the warp generated in the paper is pressed in the width direction of the paper. As shown in the figure, the paper feed roller 20g at the standby position A and the intermediate roller 20d at the standby position B have a width that contacts the entire range of the printing paper PM, but the paper feed driven roller 20h at the standby position A. In contrast to pressing the printing paper PM by arranging a plurality of rollers in contact with a part of the printing paper PM in the width direction of the paper, the intermediate driven roller 20e and the intermediate driven roller 20f at the standby position B are printed. A roller that abuts a part of the paper PM is disposed at a position approximately one center at a position to press the printing paper PM. That is, the standby position A is wider than the standby position B in the range in which th FIG. 19 is a diagram for explaining the relationship between the decurling effect and the range in which the support member that maintains the warp generated in the paper is pressed in the width direction of the paper. As shown in the figure, the paper feed roller 20g at the standby position A and the intermediate roller 20d at the standby position B have a width that contacts the entire range of the printing paper PM, but the paper feed driven roller 20h at the standby position A. In contrast to pressing the printing paper PM by arranging a plurality of coil in contact with a part of the printing paper PM in the width direction of the paper, the intermediate driven roller 20e and the intermediate driven roller 20f at the standby position B are printed. A roller that abuts a part Of the paper PM is disposed at a position approximately one center at a position to press the printing paper PM. That is, the standby position A is wider than the standby position B in the range in which th e support member that maintains the warp generated in the paper is pressed in the paper width direction. As a result, the decurling effect corresponding to the range in which the supporting member that maintains the warp generated in the sheet is pressed in the width direction of the sheet is stronger at the standby position A than at the standby position B. That is, the decurling effect is stronger as the range in which the support member that maintains the warp generated in the sheet presses in the width direction of the sheet is wider, and the range in which the support member that maintains the warp generated in the sheet presses in the width direction of the sheet. The narrower it becomes, the weaker it becomes. e support member that maintains the warp generated in the paper is pressed in the paper width direction. As a result, the decurling effect corresponding to the range in which the supporting member that maintains the warp generated in the sheet is pressed in the width direction of the sheet is stronger at the standby position A than at the standby position B. That is, the decurling effect is stronger as the range in which the support member that maintains the warp generated in the sheet presses in the width direction of the sheet is wider , and the range in which the support member that maintains the warp generated in the sheet presses in the width direction of the sheet. The narrower it becomes, the weaker it becomes.

次に、表面印刷が完了したか否かを判断する(S50)。表面印刷が完了していない場合は(S50:No)表面印刷が完了するまで待機し、表面印刷が完了している場合は(S50:Yes)、ステップS40にて決定された待機位置で待機を行いつつ、裏面印刷が可能な位置まで印刷用紙PMを搬送する(S60)。本実施形態においては、当該搬送は用紙の反転給紙に相当する。   Next, it is determined whether or not front side printing is completed (S50). If the front surface printing is not completed (S50: No), it waits until the front surface printing is completed. If the front surface printing is completed (S50: Yes), the standby is determined at the standby position determined in step S40. While performing, the printing paper PM is conveyed to a position where the back side printing is possible (S60). In the present embodiment, the conveyance corresponds to the reverse feeding of the paper.

待機位置の特定は、例えば、図9に示す紙検出センサー20lと各ローラーを駆動する搬送モーター34の駆動ステップ数にて特定することができる。より具体的な一例を挙げると、用紙検出手段にて用紙の先端が検出されてから、各ローラーのPWM駆動を何ステップ行えば待機位置に到達するかを示すデータが予め用意されており、当該データに基づく搬送駆動を行うことにより、所望の位置にて印刷用紙PMの搬送を停止させることができる。むろん、印刷用紙PMの搬送されている位置を直接に検出する手段を待機位置付近に設けて待機位置へ用紙が到達したことを検出し、搬送を停止させてもかまわない。なお、本実施形態では、各待機位置において待機開始から搬送再開までの待機時間は一定としてある。   The standby position can be specified by, for example, the number of drive steps of the paper detection sensor 201 shown in FIG. 9 and the transport motor 34 that drives each roller. As a more specific example, data indicating how many steps the PWM driving of each roller is performed after the leading edge of the paper is detected by the paper detection means is prepared in advance, By performing the conveyance driving based on the data, the conveyance of the printing paper PM can be stopped at a desired position. Of course, a means for directly detecting the position where the printing paper PM is conveyed may be provided near the standby position to detect that the paper has reached the standby position, and the conveyance may be stopped. In this embodiment, the standby time from the standby start to the resumption of conveyance at each standby position is constant.

裏面印刷が可能な位置まで印刷用紙PMを搬送すると、裏面印刷のための搬送制御を行う(S70)。すなわち、裏面印刷のための搬送制御を行いつつ、搬送制御と連動して行われる記録ヘッドやキャリッジの駆動によって裏面印刷が行われる。なお、例えば、裏面印刷の行われる場所と待機位置との位置関係次第では、裏面印刷を行いつつ裏面印刷のための搬送を行っている間に、裏面印刷を行っていない他の部位が待機位置に差し掛かる場合もある。このような場合は、裏面印刷の途中で待機対象部位が待機位置に来た時点で裏面印刷を一時停止し、待機時間の経過後に裏面印刷を再開するように構成することもできる。裏面印刷が完了すると、排紙ローラー20iの駆動により、印刷用紙PMがスタッカ12に排出されて積層される(S80)。   When the printing paper PM is transported to a position where back side printing is possible, transport control for back side printing is performed (S70). That is, the back side printing is performed by driving the recording head and the carriage which are performed in conjunction with the transport control while performing the transport control for the back side printing. Note that, for example, depending on the positional relationship between the place where the back side printing is performed and the standby position, the other part that is not performing the back side printing is in the standby position while performing the back side printing while performing the back side printing. There is also a case where In such a case, it may be configured such that the back surface printing is temporarily stopped when the standby target part reaches the standby position during the back surface printing, and the back surface printing is resumed after the standby time has elapsed. When the back side printing is completed, the printing paper PM is discharged and stacked on the stacker 12 by driving the paper discharge roller 20i (S80).

以上説明したように、本実施形態では、印刷用紙PMの表面に印刷を行った後に印刷用紙PMの裏面に印刷を行うために用紙の表裏を反転させるための搬送において、印刷用紙PMの表面に対するインクの付着量を表面の領域毎に判定し、上記搬送の経路上であって、印刷用紙PMの表面に対するインクの付着により発生する印刷媒体の膨潤カールの反りと逆向きの反りを、インクの付着量が所定値以上と判定された領域を有する印刷用紙PMの部位に発生させる所定位置において、上記印刷媒体の搬送を所定時間待機させるようにしてある。よって、少なくとも、プリンター100に対して機構等を追加することなく、付着されたインク量に応じた適切なデカールを行うことが可能となる。   As described above, in the present embodiment, in the conveyance for reversing the front and back of the paper in order to perform printing on the back surface of the printing paper PM after printing on the front surface of the printing paper PM, The amount of ink adhering is determined for each surface area, and the warpage in the direction opposite to the warpage of the swelling curl of the print medium caused by the ink adhering to the surface of the printing paper PM on the transport path is determined. The printing medium is kept waiting for a predetermined time at a predetermined position where it is generated at a portion of the printing paper PM having an area where the adhesion amount is determined to be equal to or greater than a predetermined value. Therefore, it is possible to perform appropriate decurling according to the amount of attached ink without adding a mechanism or the like to the printer 100 at least.

(3)変形例:
(3−1)変形例1:
上述した実施形態では、インク打ち込み量に応じて使い分けるデカール効果の度合いを3段階(待機位置A、待機位置B、待機しない)としたが、むろん、インク打ち込み量に応じて使い分けるデカール効果の度合いを4段階以上としてもよく、例えば、待機位置を3箇所以上設けることによりデカール効果の度合いを4段階以上としてもよい。
(3) Modification:
(3-1) Modification 1:
In the embodiment described above, the degree of the decurling effect that is selectively used according to the ink hit amount is set in three stages (standby position A, standby position B, and not stand-by). For example, the degree of the decurling effect may be four or more by providing three or more standby positions.

(3−2)変形例2:
上述した実施形態や変形例では、複数の待機位置を使い分けることにより複数のデカール効果を実現したが、待機時間を変更することにより複数のデカール効果を実現してもよい。 In the above-described embodiment and modification, a plurality of decal effects are realized by properly using a plurality of standby positions, but a plurality of decal effects may be realized by changing the standby time. すなわち、同じ待機位置であっても、インク打ち込み量の多い領域を有する部位を待機させる場合は待機時間を長くし、インク打ち込み量の少ない領域を有する部位を待機させる場合は待機時間を短くする。 That is, even in the same standby position, the waiting time is lengthened when waiting for a portion having a region having a large amount of ink shot, and shortening the waiting time when waiting for a portion having a region having a small amount of ink shot. このように待機時間を様々にした待機を行うことにより、例えば、デカール効果のある待機位置が少ない場合にも複数レベルのデカールを印刷用紙PMに適用することができる。 By performing the standby with various standby times in this way, for example, a plurality of levels of decals can be applied to the printing paper PM even when there are few standby positions having a decal effect. むろん、待機位置と待機時間とを適宜に組み合わせることにより、インク打ち込み量に応じた適切なデカールを行うことができる。 Of course, by appropriately combining the standby position and the standby time, it is possible to perform an appropriate decal according to the amount of ink injected. (3-2) Modification 2: (3-2) Modification 2:
In the above-described embodiments and modifications, a plurality of decurling effects are realized by using a plurality of standby positions, but a plurality of decurling effects may be realized by changing the waiting time. That is, even at the same standby position, the standby time is lengthened when a part having a region with a large amount of ink shot is made to stand by, and the standby time is shortened when a part having a region with a small amount of ink shot is made to stand by. By performing the standby with various standby times in this way, for example, even when there are few standby positions having a decurling effect, a plurality of levels of decals can be applied to the printing paper PM. Of course, by appropriately combining the standby position and the standby time, it is possible to perform an appropriate decurling according to the ink hit amount. In the above-described embodiments and modifications, a plurality of decurling effects are realized by using a plurality of standby positions, but a plurality of decurling effects may be realized by changing the waiting time. That is, even at the same standby position, the standby time is lengthened when a part having a region with a large amount of ink shot is made to stand by, and the standby time is shortened when a part having a region with a small amount of ink shot is made to stand by. By performing the standby with various standby times in this way, for example, even when there are few standby positions having a decurling effect, a plurality of levels of decals can be applied to the printing paper PM. Of course, by appropriately combining the standby position and the standby time, it is possible to perform an appropriate decurling according to the ink hit amount.

(3−3)変形例3:
上述した実施形態や変形例では、各領域ごとに待機の必要性を判断していたが、複数領域について待機が必要な場合は、各領域独立に待機位置と待機時間とを設定してもよいし、他の領域に対してデカールのための待機している時間を考慮して、他の領域に対する待機時間を短縮してもよい。 In the above-described embodiment and modification, the necessity of waiting is determined for each area, but when waiting is required for a plurality of areas, the waiting position and the waiting time may be set independently for each area. However, the waiting time for the other area may be shortened in consideration of the waiting time for the decal with respect to the other area. (3-3) Modification 3: (3-3) Modification 3:
In the embodiment and the modification described above, the necessity of standby is determined for each area. However, when standby is required for a plurality of areas, a standby position and a standby time may be set independently for each area. However, the waiting time for the other area may be shortened in consideration of the waiting time for the decal for the other area. In the embodiment and the modification described above, the necessity of standby is determined for each area. However, when standby is required for a plurality of areas, a standby position and a standby time may be set independently for each area. However, the waiting time for the other area may be shortened in consideration of the waiting time for the decal for the other area.

(3−4)変形例4:
上述した実施形態や変形例で説明したように、インク打ち込み量が多いほどデカール効果の強い待機を行い、インク打ち込み量が少ないほどデカール効果が小さくなる待機を行う。 As described in the above-described embodiments and modifications, the larger the ink injection amount, the stronger the standby for the decal effect, and the smaller the ink injection amount, the smaller the decal effect. すなわち、印刷モードが速度優先の場合と画質優先の場合とを比較すると、同じ画像を印刷する場合でも、速度優先の場合はデカール効果の弱い待機位置(又は待機を行わない)となり、画質優先の場合はデカール効果の強い待機位置となる。 That is, when comparing the case where the print mode is speed priority and the case where image quality is prioritized, even when the same image is printed, the decal effect is weak in the standby position (or no standby is performed) in the case of speed priority, and image quality is prioritized. In that case, the standby position has a strong decal effect. (3-4) Modification 4: (3-4) Modification 4: Modification 4:
As described in the above-described embodiments and modifications, a standby with a stronger decurling effect is performed as the ink ejection amount is larger, and a standby is performed with a smaller decurling effect as the ink ejection amount is smaller. In other words, when the print mode is speed priority and image quality priority is compared, even if the same image is printed, if the speed priority is given, the standby position where the decurling effect is weak (or no standby is performed) and the image quality priority is given. In this case, it becomes a standby position with a strong decal effect. As described in the above-described embodiments and modifications, a standby with a stronger decurling effect is performed as the ink ejection amount is larger, and a standby is performed with a smaller decurling effect as the ink ejection amount is smaller. In other words, when the print mode is speed priority and image quality priority is compared, even if the same image is printed, if the speed priority is given, the standby position where the decurling effect is weak (or no standby is performed) and the image quality priority is given. In this case, it becomes a standby position with a strong decal effect.

(3−5)変形例5:
以上説明した実施形態や変形例では、印刷用紙PMを反転させている間に印刷用紙PMを反転給紙経路上に維持するための部材として、ローラーと従動ローラーとを用いているが、ローラーと弾性体等のような付勢部材を用いてもよい。 In the embodiments and modifications described above, a roller and a driven roller are used as members for maintaining the printing paper PM on the reversing paper feed path while the printing paper PM is inverted. An urging member such as an elastic body may be used. 図20に、ローラーと弾性体を用いた場合の一例を示す。 FIG. 20 shows an example when a roller and an elastic body are used. 同図では、中間ローラーに弾性体を適用した場合を示してある。 In the figure, the case where an elastic body is applied to the intermediate roller is shown. 同図に示すように、中間ローラー20dはゴムなどの摩擦力の高い部材で形成されており、中間ローラー20dの回転に伴い当該中間ローラー20dに巻きまわされた印刷用紙PMが搬送される。 As shown in the figure, the intermediate roller 20d is formed of a member having a high frictional force such as rubber, and the printing paper PM wound around the intermediate roller 20d is conveyed as the intermediate roller 20d rotates. このとき、弾性体が、印刷用紙PMを中間ローラー20dのローラー面に押し付けることにより、印刷用紙PMを反転給紙経路上に維持する付勢部材としての役割を担っている。 At this time, the elastic body plays a role as an urging member for maintaining the printing paper PM on the reverse paper feed path by pressing the printing paper PM against the roller surface of the intermediate roller 20d. (3-5) Modification 5: (3-5) Modification 5:
In the embodiment and the modification described above, a roller and a driven roller are used as members for maintaining the printing paper PM on the reverse feeding path while the printing paper PM is reversed. An urging member such as an elastic body may be used. FIG. 20 shows an example when a roller and an elastic body are used. In the same figure, the case where an elastic body is applied to the intermediate roller is shown. As shown in the figure, the intermediate roller 20d is formed of a member having a high frictional force such as rubber, and the printing paper PM wound around the intermediate roller 20d is conveyed along with the rotation of the intermediate roller 20d. At this time, the elastic body plays a role as an urging member for maintaining the printing paper PM on the reverse feeding path by pressing the printing paper PM against the roller surface of the intermediate roller 20d. In the embodiment and the modification described above, a roller and a driven roller are used as members for maintaining the printing paper PM on the reverse feeding path while the printing paper PM is reversed. An urging member such as an elastic body may be used. FIG. 20 shows an example when a roller and an elastic body are used. In the same figure, the case where an elastic body is applied to the intermediate roller is shown. As shown in the figure, the intermediate roller 20d is formed of a member having a high frictional force such as rubber, and the printing paper PM wound around the intermediate roller 20d is transmitted along with the rotation of the intermediate roller 20d. At this time, the elastic body plays a role as an urging member for maintaining the printing paper PM on the reverse feeding path by pressing the printing paper PM against the roller surface of the intermediate roller 20d.

(3−6)変形例6:
上述した実施形態や変形例においては、ローラーで印刷用紙PMを搬送するプリンターを例にとって説明したが、むろん、ベルト駆動にて印刷用紙PMを搬送するプリンターにおいても本発明は適用可能である。また、上述した実施形態では印刷用紙PMの反転経路を、中間ローラー20dが規定していたが、この反転経路を曲面にて規定し、ローラーにて当該反転経路上を印刷用紙PMが曲面に沿って移動させるようにすることもできる。また、ローラーの数も適宜に変更することができる。
(3-6) Modification 6:
In the above-described embodiments and modifications, the printer that transports the printing paper PM with a roller has been described as an example. However, the present invention can also be applied to a printer that transports the printing paper PM by belt driving. In the above-described embodiment, the reverse path of the printing paper PM is defined by the intermediate roller 20d. However, the reverse path is defined by a curved surface, and the printing paper PM follows the curved surface on the reverse path by the roller. It can also be moved. Moreover, the number of rollers can also be changed suitably. In the above-described embodiments and modifications, the printer that transports the printing paper PM with a roller has been described as an example. However, the present invention can also be applied to a printer that transports the printing paper PM by belt driving. In The above-described embodiment, the reverse path of the printing paper PM is defined by the intermediate roller 20d. However, the reverse path is defined by a curved surface, and the printing paper PM follows the curved surface on the reverse path by the roller It can also be moved. Moreover, the number of printer can also be changed optionally.

(3−7)変形例7:
上述した実施形態や変形例では、印刷用紙PMの表面におけるインク打込量に基づいて、各領域に適切なデカール効果が適用されるように待機位置や待機時間を調整していたが、インク打込量に加えて温度や湿度等の印刷環境を考慮して待機位置や待機時間を決定してもよい。 In the above-described embodiment and modification, the standby position and the standby time are adjusted so that an appropriate decal effect is applied to each region based on the ink injection amount on the surface of the printing paper PM. The standby position and standby time may be determined in consideration of the printing environment such as temperature and humidity in addition to the amount of ink. 図21は、温度や湿度に応じて膨潤カールの度合がどのように変化するかを示すグラフである。 FIG. 21 is a graph showing how the degree of swelling curl changes depending on the temperature and humidity. 同図に示すように、温度が高くなるほど膨潤カールの反りが小さくなり、湿度が高くなるほど膨潤カールの反りが小さくなる傾向がある。 As shown in the figure, the higher the temperature, the smaller the warp of the swelling curl, and the higher the humidity, the smaller the warp of the swelling curl. 従って、温度が高くなるほど図11に示した閾値を低くし、湿度が高くなるほど図11に示した閾値を低くすることにより、より適切なデカール効果を得ることができることが分かる。 Therefore, it can be seen that a more appropriate decal effect can be obtained by lowering the threshold value shown in FIG. 11 as the temperature rises and lowering the threshold value shown in FIG. 11 as the humidity rises. なお、温度や湿度は、プリンター100が温度センサーや湿度センサーを備えることにより検出することができる。 The temperature and humidity can be detected by equipping the printer 100 with a temperature sensor and a humidity sensor. (3-7) Modification 7: (3-7) Modification 7:
In the above-described embodiments and modifications, the standby position and the standby time are adjusted so that an appropriate decurling effect is applied to each region based on the amount of ink applied on the surface of the printing paper PM. The standby position and the standby time may be determined in consideration of the printing environment such as temperature and humidity in addition to the loading amount. FIG. 21 is a graph showing how the degree of swelling curl changes according to temperature and humidity. As shown in the figure, the swelling curl warpage decreases as the temperature increases, and the swelling curl warp tends to decrease as the humidity increases. Therefore, it can be seen that a more appropriate decurling effect can be obtained by lowering the threshold value shown in FIG. 11 as the temperature becomes higher and lowering the threshold value shown in FIG. 11 as the humidity becomes higher. The temperature and humidity can be detected when the printe In the above-described embodiments and modifications, the standby position and the standby time are adjusted so that an appropriate decurling effect is applied to each region based on the amount of ink applied on the surface of the printing paper PM. The standby position and the Standby time may be determined in consideration of the printing environment such as temperature and humidity in addition to the loading amount. FIG. 21 is a graph showing how the degree of swelling curl changes according to temperature and humidity. As shown in the figure, the swelling curl warpage decreases as the temperature increases, and the swelling curl warp tends to decrease as the humidity increases. Therefore, it can be seen that a more appropriate decurling effect can be obtained by lowering the threshold value shown in FIG. 11 as the temperature becomes higher and lowering the threshold value shown in FIG. 11 as the humidity becomes higher. The temperature and humidity can be detected when the printe r 100 includes a temperature sensor and a humidity sensor. r 100 includes a temperature sensor and a humidity sensor.

(3−8)変形例8:
上述した実施形態や変形例では、表面に対するインク打込量に基づいて待機位置や待機の有無を決定していたが、いずれかの領域において、表面に対するインク打込量が上述したデューティーの閾値を超えた場合であって裏面に印刷パターンが無い場合は、当該領域を有する部位については待機を行わないようにしてもよい。このように、表面印刷によって膨潤カールが発生する領域であっても、当該領域の裏側に対して行われる裏面印刷の印刷品質に対する影響が少ない場合は待機を行わず、印刷速度(搬送速度)を優先してもよい。
(3-8) Modification 8:
In the embodiment and the modification described above, the standby position and the presence / absence of standby are determined based on the amount of ink applied to the surface. However, in any region, the amount of ink applied to the surface satisfies the above-described duty threshold. If there is no print pattern on the back surface, the standby may not be performed for the part having the region. In this way, even in a region where swelling curl occurs due to surface printing, if there is little influence on the print quality of backside printing performed on the backside of the region, standby is not performed and the printing speed (conveyance speed) is set. You may give priority. In the embodiment and the modification described above, the standby position and the presence / absence of standby are determined based on the amount of ink applied to the surface. However, in any region, the amount of ink applied to the surface satisfies the above- If there is no print pattern on the back surface, the standby may not be performed for the part having the region. In this way, even in a region where swelling curl occurs due to surface printing, if there is little influence on the print quality of backside printing performed on the backside of the region, standby is not performed and the printing speed (conveyance speed) is set. You may give priority.

(3−9)変形例9:
上述した実施形態や変形例では、領域単位でインク打込量を評価しているが、1つの領域内であっても、インク打込量の多い部分と少ない部分とが並存する可能性もある。 In the above-described embodiment and modification, the ink injection amount is evaluated for each region, but even within one region, there is a possibility that a portion having a large ink injection amount and a portion having a small ink injection amount coexist. ..
このような場合には、印字部分と非印字部分の面積比率に応じて、単位面積当りのインク打込量と、領域全体での平均的なインク打込量とを、適宜に切換えて各領域のインク打込量とする。 In such a case, the ink injection amount per unit area and the average ink injection amount in the entire area are appropriately switched according to the area ratio of the printed portion and the non-printed portion to each area. Ink injection amount. 狭い領域でインク打込量が多い(局所的にインク打込量が高い)場合は当該領域の待機位置をデカール効果の強い位置とし、広い領域でインク打込量が多い(領域の全体的にインク打込量が多い)場合は、当該領域の待機位置をデカール効果の弱い位置とする。 When the ink injection amount is large in a narrow area (the ink injection amount is locally high), the standby position in the area is set as the position where the decal effect is strong, and the ink injection amount is large in a wide area (overall of the area). If the amount of ink injected is large), the standby position in the area is set to the position where the decal effect is weak. より具他的には、ある領域において非印字部分の面積よりも印字部分の面積の方が広い場合は、領域全体にインク打込が分布しているものと判断して、領域の平均的なインク打込量に基づいて閾値を判断し、待機位置を決定する。 More specifically, if the area of ​​the printed part is larger than the area of ​​the non-printed part in a certain area, it is judged that the ink injection is distributed over the entire area, and the area is average. The threshold value is determined based on the ink injection amount, and the standby position is determined. 一方、ある領域において印字部分の面積よりも非印字部分の面積の方が広い場合は、インク打込が局所的に分布しているものと判断して、単位面積あたりの最大インク打込量に基づいて閾値を判断し、待機位置を決定する。 On the other hand, if the area of ​​the non-printed area is larger than the area of ​​the printed area in a certain area, it is judged that the ink injection is locally distributed, and the maximum ink injection amount per unit area is set. The threshold value is determined based on this, and the standby position is determined. なお、このように非印字部分と印字部分との面積比率に応じてインク打込量を適宜に選択する場合は、領域の平均的なインク打込量に基づいて待機位置を決定する場合の閾値を、単位面積あたりの最大インク打込量に基づいて待機位置を決定する場合とで、異なる閾値としてもよい。 When the ink injection amount is appropriately selected according to the area ratio between the non-printed portion and the printed portion in this way, the threshold value for determining the standby position based on the average ink injection amount in the area. May be different from the case where the standby position is determined based on the maximum ink injection amount per unit area. このように構成することで、局所的なカールを適宜にデカールするように待機位置を選択することができる。 With this configuration, the standby position can be selected so as to appropriately decal the local curl. (3-9) Modification 9: (3-9) Modification 9:
In the above-described embodiments and modifications, the ink ejection amount is evaluated in units of regions. However, even within one region, there is a possibility that a portion with a large amount of ink ejection and a portion with a small amount of ink ejection coexist. . In the above-described embodiments and modifications, the ink ejection amount is evaluated in units of regions. However, even within one region, there is a possibility that a portion with a large amount of ink ejection and a portion with a small amount of ink ejection coexist ..
In such a case, according to the area ratio of the printed portion and the non-printed portion, the ink placement amount per unit area and the average ink placement amount in the entire region are appropriately switched to each region. The amount of ink applied. If the ink placement amount is large in a narrow area (the ink placement amount is locally high), the standby position in the area is set to a position where the decurling effect is strong, and the ink placement amount is large in the wide area (the entire area is large). In the case where the amount of ink hit is large), the standby position of the area is set to a position where the decurling effect is weak. More specifically, if the area of the printed part is larger than the area of the non-printed part in a certain area, it is determined that ink ejection is distributed throughout the area, and the average of the area is determined. A standby value is determined by determining a threshold value based on the ink ejection am In such a case, according to the area ratio of the printed portion and the non-printed portion, the ink placement amount per unit area and the average ink placement amount in the entire region are appropriately switched to each region. The amount of ink applied If the ink placement amount is large in a narrow area (the ink placement amount is locally high), the standby position in the area is set to a position where the decurling effect is strong, and the ink placement amount is large in the wide area (the entire area is large). In the case where the amount of ink hit is large), the standby position of the area is set to a position where the decurling effect is weak. More specifically, if the area of ​​the printed part is larger than the area of ​​the non-printed part in a certain area, it is determined that ink ejection is distributed throughout the area, and the average of the area is determined. A standby value is determined by determining a threshold value based on the ink ejection am ount. On the other hand, if the area of the non-printing part is larger than the area of the printing part in a certain area, it is determined that the ink ejection is locally distributed, and the maximum ink ejection amount per unit area is determined. Based on the threshold value, the standby position is determined. In addition, when the ink placement amount is appropriately selected according to the area ratio between the non-printing portion and the printing portion as described above, the threshold value for determining the standby position based on the average ink placement amount of the region May be set to a different threshold value when the standby position is determined based on the maximum ink ejection amount per unit area. With this configuration, the standby position can be selected so as to appropriately decur local curl. ount. On the other hand, if the area of ​​the non-printing part is larger than the area of ​​the printing part in a certain area, it is determined that the ink ejection is locally distributed, and the maximum ink ejection amount per unit area In addition, when the ink placement amount is appropriately selected according to the area ratio between the non-printing portion and the printing portion as described above, the threshold value for determining is determined. Based on the threshold value, the standby position is determined. The standby position based on the average ink placement amount of the region May be set to a different threshold value when the standby position is determined based on the maximum ink ejection amount per unit area. With this configuration, the standby position can be selected so as to appropriately decur local curl.

上述した実施形態では、インクを吐出して印刷を行う印刷装置を例にとり説明を行ったが、本発明を適用可能な印刷装置は、微小量の液滴を噴射(吐出)する液体吐出ヘッド等を備える液体吐出装置等、インク以外の流体を吐出する装置でもよい。液滴は、液体吐出装置が吐出する粒状の液体、涙状の液体、糸状に尾を引く液体等を含む。液体は、液体吐出装置が吐出できる材料であればよく、例えば、液状体、ゾル、ゲル水、無機溶剤、有機溶剤、溶液、液状樹脂、液状金属(金属融液)のような流状体、等の液相の物質を含む。また、液相の物質のみならず、液体は、顔料や金属粒子といった固形物からなる機能材料の粒子を溶媒に溶解、分散又は混合したもの等も含む。インクや液晶等は、液体の代表的な例である。前記インクは、一般的な水性インク及び油性インク、並びに、ジェルインク、ホットメルトインク、等の各種液体組成物を包含するものとする。液体吐出装置には、例えば、液晶ディスプレイ、EL(エレクトロルミネッセンス)ディスプレイ、面発光ディスプレイ、カラーフィルタの製造等に用いられる電極材や色材といった材料を分散又は溶解のかたちで含む液体を吐出する装置が含まれる。また、液体吐出装置には、バイオチップ製造に用いられる生体有機物を吐出する装置、精密ピペットとして用いられ試料となる液体を吐出する装置、捺染装置、マイクロディスペンサ、時計やカメラといった精密機械にピンポイントで潤滑油を吐出する装置、光通信素子等に用いられる微小半球レンズ(光学レンズ)等を形成するために紫外線硬化樹脂といった透明樹脂液を基板上に吐出する装置、基板等をエッチングするために酸やアルカリといったエッチング液を吐出する装置、等が含まれる。   In the above-described embodiment, the description has been given by taking the printing apparatus that performs printing by discharging ink as an example. However, the printing apparatus to which the present invention can be applied includes a liquid discharge head that ejects (discharges) a minute amount of liquid droplets, and the like. A device that ejects fluid other than ink, such as a liquid ejection device including The liquid droplet includes a granular liquid ejected by the liquid ejection device, a tear-like liquid, a liquid having a tail in a string shape, and the like. The liquid may be any material that can be discharged by the liquid discharge device. For example, a liquid, a sol, gel water, an inorganic solvent, an organic solvent, a solution, a liquid resin, a fluid such as a liquid metal (metal melt), Liquid phase substances such as In addition to liquid phase substances, liquids include those obtained by dissolving, dispersing, or mixing particles of functional materials made of solid materials such as pigments and metal particles in a solvent. Ink, liquid crystal, and the like are typical examples of liquids. The ink includes general water-based ink and oil-based ink, and various liquid compositions such as gel ink and hot melt ink. Examples of the liquid ejection device include a device for ejecting a liquid containing a material such as an electrode material or a color material used for manufacturing a liquid crystal display, an EL (electroluminescence) display, a surface emitting display, or a color filter in a dispersed or dissolved state. Is included. In addition, the liquid ejection device is a device that ejects biological organic materials used in biochip manufacturing, a device that ejects liquid as a sample used as a precision pipette, a textile printing device, a microdispenser, a clock or a camera. In order to etch a substrate, a device for discharging a transparent resin liquid such as an ultraviolet curable resin to form a device for discharging lubricating oil, a micro hemispherical lens (optical lens) used for an optical communication element, etc. An apparatus for discharging an etching solution such as acid or alkali is included.

なお、本発明は上述した実施形態や変形例に限られず、上述した実施形態および変形例の中で開示した各構成を相互に置換したり組み合わせを変更したりした構成、公知技術並びに上述した実施形態および変形例の中で開示した各構成を相互に置換したり組み合わせを変更したりした構成、等も含まれる。   Note that the present invention is not limited to the above-described embodiments and modifications, and the structures disclosed in the above-described embodiments and modifications are mutually replaced, the combinations are changed, the known technique, and the above-described implementations. Configurations in which the configurations disclosed in the embodiments and modifications are mutually replaced or the combinations are changed are also included.

10…給紙カセット、11…手差しトレイ、12…スタッカ、13…操作パネル、14…キャリッジ、14a…記録ヘッド、15…ガイド軸、20a…分離ローラー、20b…分離ローラー、20c…分離従動ローラー、20d…中間ローラー、20e…中間従動ローラー、20f…中間従動ローラー、20g…紙送りローラー、20h…紙送り従動ローラー、20i…排紙ローラー、20j…排紙従動ローラー、20k…プラテン、20l…用紙検知センサー、30…制御部、31…記憶部、32…I/F、33…キャリッジモーター、34…搬送モーター、100…プリンター、ADF1…自動用紙分離部、ADF2…自動用紙分離部、PM…印刷用紙 DESCRIPTION OF SYMBOLS 10 ... Paper feed cassette, 11 ... Manual feed tray, 12 ... Stacker, 13 ... Operation panel, 14 ... Carriage, 14a ... Recording head, 15 ... Guide shaft, 20a ... Separation roller, 20b ... Separation roller, 20c ... Separation driven roller, 20d ... Intermediate roller, 20e ... Intermediate driven roller, 20f ... Intermediate driven roller, 20g ... Paper feed roller, 20h ... Paper feed driven roller, 20i ... Paper discharge roller, 20j ... Paper discharge driven roller, 20k ... Platen, 20l ... Paper Detection sensor, 30 ... control unit, 31 ... storage unit, 32 ... I / F, 33 ... carriage motor, 34 ... conveyance motor, 100 ... printer, ADF1 ... automatic paper separation unit, ADF2 ... automatic paper separation unit, PM ... printing Paper

Claims (6)

  1. 印刷媒体の一方の面に対する液体の付着を行った後に前記印刷媒体の他方の面に対する液体の付着を行うための前記印刷媒体の搬送を行う印刷装置であって、
    液体の付着量を前記一方の面の領域毎に判定する判定手段と、
    前記印刷媒体の所定部位を前記搬送の経路上の待機位置にて所定時間待機させる搬送待機手段と、を備え、
    前記所定部位は前記判定手段によって液体の付着量が所定値以上と判定された領域を有する部位であり、
    前記待機位置は前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反り前記印刷媒体の前記所定部位に発生させる位置であることを特徴とする印刷装置。 The printing apparatus is characterized in that the standby position is a position where a warp in the opposite direction to the warp of the printing medium generated by adhesion of a liquid to the one surface is generated at the predetermined portion of the printing medium. A printing apparatus that transports the print medium for attaching the liquid to the other surface of the print medium after the liquid is attached to the one surface of the print medium, A printing apparatus that transports the print medium for attaching the liquid to the other surface of the print medium after the liquid is attached to the one surface of the print medium,
    Determination means for determining the amount of liquid adhesion for each region of the one surface; Determination means for determining the amount of liquid adhesion for each region of the one surface;
    Transport standby means for waiting a predetermined portion of the print medium at a standby position on the transport path for a predetermined time, Transport standby means for waiting a predetermined portion of the print medium at a standby position on the transport path for a predetermined time,
    The predetermined part is a part having a region in which the amount of adhesion of the liquid is determined to be a predetermined value or more by the determination unit, The predetermined part is a part having a region in which the amount of adhesion of the liquid is determined to be a predetermined value or more by the determination unit,
    The standby position is a printing apparatus which is a position that makes warped in the opposite direction from the warp of the printing medium caused by adhesion of the liquid to the one surface to the predetermined portion of the print medium. The standby position is a printing apparatus which is a position that makes warped in the opposite direction from the warp of the printing medium caused by adhesion of the liquid to the one surface to the predetermined portion of the print medium.
  2. 記印刷媒体を搬送する方向における前記所定部位の一端が、支持部材によって挟持されることにより前記印刷媒体を搬送する方向における前記所定部位の他端が所定の台面に押し付けられる位置が、前記待機位置の少なくとも一つであることを特徴とする請求項1に記載の印刷装置。 One end of the predetermined portion in the direction for conveying the pre-Symbol print medium, the position where the other end of the predetermined portion in the direction of conveying the printing medium by being clamped by the support member is pressed against a predetermined base surface, said standby The printing apparatus according to claim 1, wherein the printing apparatus is at least one of the positions .
  3. 記所定部位の全体が前記印刷媒体の表裏を反転させる反転ローラーに接触する位置が、前記待機位置の少なくとも一つであることを特徴とする請求項1又は請求項2に記載の印刷装置。 Position entirely in contact with the reverse roller to reverse the sides of the printing medium before Symbol predetermined site, the printing apparatus according to claim 1 or claim 2, characterized in that at least one of said waiting position.
  4. 前記所定部位は、前記所定部位の少なくとも一方を支持部材にて挟持された状態で前記一方の面に対する液体の付着が行われる領域を有する部位であり、
    記所定部位の全体が前記印刷媒体の表裏を反転させる反転ローラーに接触する位置が、前記待機位置の少なくとも一つであることを特徴とする請求項1〜請求項3の何れか1項に記載の印刷装置。 Position entirely in contact with the reverse roller to reverse the sides of the printing medium before Symbol predetermined site, to any one of claims 1 to 3, characterized in that at least one of said stand-by position The printing device described. The predetermined portion is a portion having a region where the liquid adheres to the one surface in a state where at least one of the predetermined portions is held by a support member, The predetermined portion is a portion having a region where the liquid adheres to the one surface in a state where at least one of the predetermined portions is held by a support member,
    Position entirely in contact with the reverse roller to reverse the sides of the printing medium before Symbol predetermined site, to any one of claims 1 to 3, characterized in that at least one of said stand-by position The printing apparatus as described. Position entirely in contact with the reverse roller to reverse the sides of the printing medium before Symbol predetermined site, to any one of claims 1 to 3, characterized in that at least one of said stand-by position The printing apparatus as described.
  5. 前記待機位置においては、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反りを前記印刷媒体に生じさせた状態に維持する支持部材が前記印刷媒体を挟持する構成とされ、
    前記待機位置が複数有る場合に、前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反りであって各待機位置において発生する反りの曲率と、各待機位置において前記支持部材が前記印刷媒体を挟持する前記印刷媒体の幅方向の範囲と、各待機位置において前記支持部材が前記印刷媒体を挟持する力と、に応じて、いずれかの待機位置が選択されることを特徴とする請求項1〜請求項4の何れか1項に記載の印刷装置。 When there are a plurality of the standby positions, the curvature of the warp generated in each standby position, which is the warp in the direction opposite to the warp of the print medium generated by the adhesion of the liquid to the one surface, and the support at each standby position. the width direction of the range of the print media members sandwiching the print medium, the pressure of the support member at each standby position sandwiching the printing medium, in response to, that one of the standby position is selected The printing apparatus according to any one of claims 1 to 4, wherein the printing apparatus is characterized. In the standby position, a support member that maintains a state in which the warp in the direction opposite to the warp of the print medium caused by the adhesion of the liquid to the one surface is generated in the print medium holds the print medium. And In the standby position, a support member that maintains a state in which the warp in the direction opposite to the warp of the print medium caused by the adhesion of the liquid to the one surface is generated in the print medium holds the print medium.
    When there are a plurality of the standby positions, the curvature of the warp in the opposite direction to the warp of the printing medium caused by the adhesion of the liquid to the one surface, and the curvature at each standby position, and the support at each standby position the width direction of the range of the print media members sandwiching the print medium, the pressure of the support member at each standby position sandwiching the printing medium, in response to, that one of the standby position is selected The printing apparatus according to any one of claims 1 to 4, wherein: When there are a plurality of the standby positions, the curvature of the warp in the opposite direction to the warp of the printing medium caused by the adhesion of the liquid to the one surface, and the curvature at each standby position, and the support at each standby position the width direction of the range of the print media members sandwiching the print medium, the pressure of the support member at each standby position sandwiching the printing medium, in response to, that one of the standby position is selected The printing apparatus according to any one of claims 1 to 4, wherein:
  6. 印刷媒体の一方の面に対する液体の付着を行った後に前記印刷媒体の他方の面に対する液体の付着を行うために前記印刷媒体の搬送を行う印刷方法であって、
    液体の付着量を前記一方の面の領域毎に判定する判定工程と、 A determination step of determining the amount of liquid adhering to each region of one of the surfaces, and
    前記印刷媒体の所定部位を前記搬送の経路上の待機位置にて所定時間待機させる搬送待機工程と、を備え、 It is provided with a transport standby step of waiting a predetermined portion of the print medium at a standby position on the transport path for a predetermined time.
    前記所定部位は前記判定工程において液体の付着量が所定値以上と判定された領域を有する部位であり、 The predetermined portion is a portion having a region where the amount of liquid adhered is determined to be equal to or greater than a predetermined value in the determination step.
    前記待機位置は前記一方の面に対する液体の付着により発生する前記印刷媒体の反りと逆向きの反り前記印刷媒体の前記所定部位に発生させる位置であることを特徴とする印刷方法。 A printing method characterized in that the standby position is a position where a warp in the opposite direction to the warp of the print medium generated by adhesion of a liquid to the one surface is generated at the predetermined portion of the print medium. A printing method for transporting the print medium in order to adhere the liquid to the other surface of the print medium after the liquid has adhered to the one surface of the print medium, A printing method for transporting the print medium in order to adhere the liquid to the other surface of the print medium after the liquid has adhered to the one surface of the print medium,
    A determination step of determining the amount of liquid adhesion for each region of the one surface; A determination step of determining the amount of liquid adhesion for each region of the one surface;
    A transport standby step of waiting a predetermined portion of the print medium at a standby position on the transport path for a predetermined time, A transport standby step of waiting a predetermined portion of the print medium at a standby position on the transport path for a predetermined time,
    The predetermined part is a part having a region in which the amount of adhesion of the liquid is determined to be a predetermined value or more in the determination step, The predetermined part is a part having a region in which the amount of adhesion of the liquid is determined to be a predetermined value or more in the determination step,
    Printing method wherein a standby position which is a position that makes warped in the opposite direction from the warp of the printing medium caused by adhesion of the liquid to the one surface to the predetermined portion of the print medium. Printing method wherein a standby position which is a position that makes warped in the opposite direction from the warp of the printing medium caused by adhesion of the liquid to the one surface to the predetermined portion of the print medium.
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